Mitosis plant & animal
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Mitosis is the process of cell division that produces two daughter cells with identical copies of chromosomes. It occurs in both animal and plant cells through the same stages: interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. The key difference between animal and plant cell mitosis is that plant cells have cell walls that must form between the dividing cells.
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Lecture 6 Cell Division [Meiosis]
Meiosis is a type of cell division that produces haploid gametes from diploid germ cells for sexual reproduction. It involves one round of DNA replication followed by two nuclear divisions. The first division, meiosis I, separates homologous chromosomes. The second division, meiosis II, separates sister chromatids. This results in four haploid daughter cells each with half the number of chromosomes as the original parent cell. Meiosis ensures genetic variation between offspring and maintains chromosome number from one generation to the next.
cell division mitosis and meiosis
Mitosis and meiosis are two types of cell division. Mitosis produces two identical daughter cells from one parent cell during growth and tissue repair. Meiosis produces gametes like sperm and egg cells, reducing the chromosome number by half so fertilization restores the number. The cell cycle includes interphase where DNA replicates and cell growth occurs, as well as mitosis where chromosomes separate into two daughter cells. Unregulated cell division can lead to cancer.
Meiosis
Meiosis is a type of cell division that produces gametes, or sex cells, with half the normal number of chromosomes. It was discovered by Oscar Hertwig in 1876 while studying sea urchin eggs. Meiosis involves two cell divisions: Meiosis I and Meiosis II. In Meiosis I, homologous chromosomes separate and move to opposite sides of the cell. This reduces the chromosome number by half. Meiosis II then separates the sister chromatids, resulting in four haploid daughter cells. Meiosis introduces genetic variation through independent assortment and crossing over during prophase I. This ensures offspring receive a unique set of chromosomes from each parent.
Cell cycle & cell division
The document discusses the cell cycle and cell division processes of mitosis and meiosis. It defines the main phases of each process and compares the key differences between mitosis and meiosis. Mitosis involves one cell division producing two identical daughter cells, while meiosis involves two cell divisions producing four non-identical haploid daughter cells. The stages of each process including interphase, prophase, metaphase, anaphase and telophase are outlined in detail. Diagrams and animations are provided to illustrate each phase.
Cell DIVISION/cycle
Infer the significance of cell division.
Differentiate a DNA molecule, a chromosome, and a chromatid.
Characterize the phases of the cell cycle and their control points.
Describe the major events associated with stages of mitosis.
Explain the process of cytokinesis.
Learning Objectives
Describe the role of apoptosis in the life cycle of a cell.
Relate cancer as a result of the malfunction of the cell during the cell cycle.
Introduction to Cell division
Mitosis and meiosis are two types of cell division. Mitosis produces two daughter cells that are identical to the parent cell and occurs in somatic (body) cells. The DNA replicates and chromosomes condense and separate into two identical daughter cells. Meiosis produces four haploid gametes through two cell divisions and occurs in sex cells. During meiosis, one round of DNA replication is followed by two cell divisions, resulting in four daughter cells each with half the number of chromosomes as the original parent cell. The major difference between mitosis and meiosis is that mitosis maintains chromosome number while meiosis halves the chromosome number.
Cell division
The document discusses cell division and the cell cycle. It begins by outlining the key phases of the cell cycle - interphase, mitosis, and cytokinesis. Interphase is further broken down into the G1, S, and G2 phases where the cell grows and duplicates its contents. Mitosis is the phase where the cell nucleus divides into two identical nuclei. Cytokinesis then divides the cytoplasm into two daughter cells. The document also discusses DNA structure and replication, noting the double helix structure and enzymes involved in duplicating DNA. Abnormal cell division can lead to diseases like cancer if the cell cycle is not properly controlled.
Cell Cycle
The document discusses the cell cycle and cell division. It describes the main stages of the cell cycle including interphase (G1, S, G2 phases) and the mitotic (M) phase. Interphase involves cell growth and DNA replication, while mitosis involves nuclear division and cytokinesis. The stages of mitosis (prophase, metaphase, anaphase, telophase) and cytokinesis are explained. Control mechanisms ensure the cell cycle proceeds normally and discusses how cancer can occur if this control is disrupted.
Recommended
Lecture 6 Cell Division [Meiosis]
Meiosis is a type of cell division that produces haploid gametes from diploid germ cells for sexual reproduction. It involves one round of DNA replication followed by two nuclear divisions. The first division, meiosis I, separates homologous chromosomes. The second division, meiosis II, separates sister chromatids. This results in four haploid daughter cells each with half the number of chromosomes as the original parent cell. Meiosis ensures genetic variation between offspring and maintains chromosome number from one generation to the next.
cell division mitosis and meiosis
Mitosis and meiosis are two types of cell division. Mitosis produces two identical daughter cells from one parent cell during growth and tissue repair. Meiosis produces gametes like sperm and egg cells, reducing the chromosome number by half so fertilization restores the number. The cell cycle includes interphase where DNA replicates and cell growth occurs, as well as mitosis where chromosomes separate into two daughter cells. Unregulated cell division can lead to cancer.
Meiosis
Meiosis is a type of cell division that produces gametes, or sex cells, with half the normal number of chromosomes. It was discovered by Oscar Hertwig in 1876 while studying sea urchin eggs. Meiosis involves two cell divisions: Meiosis I and Meiosis II. In Meiosis I, homologous chromosomes separate and move to opposite sides of the cell. This reduces the chromosome number by half. Meiosis II then separates the sister chromatids, resulting in four haploid daughter cells. Meiosis introduces genetic variation through independent assortment and crossing over during prophase I. This ensures offspring receive a unique set of chromosomes from each parent.
Cell cycle & cell division
The document discusses the cell cycle and cell division processes of mitosis and meiosis. It defines the main phases of each process and compares the key differences between mitosis and meiosis. Mitosis involves one cell division producing two identical daughter cells, while meiosis involves two cell divisions producing four non-identical haploid daughter cells. The stages of each process including interphase, prophase, metaphase, anaphase and telophase are outlined in detail. Diagrams and animations are provided to illustrate each phase.
Cell DIVISION/cycle
Infer the significance of cell division.
Differentiate a DNA molecule, a chromosome, and a chromatid.
Characterize the phases of the cell cycle and their control points.
Describe the major events associated with stages of mitosis.
Explain the process of cytokinesis.
Learning Objectives
Describe the role of apoptosis in the life cycle of a cell.
Relate cancer as a result of the malfunction of the cell during the cell cycle.
Introduction to Cell division
Mitosis and meiosis are two types of cell division. Mitosis produces two daughter cells that are identical to the parent cell and occurs in somatic (body) cells. The DNA replicates and chromosomes condense and separate into two identical daughter cells. Meiosis produces four haploid gametes through two cell divisions and occurs in sex cells. During meiosis, one round of DNA replication is followed by two cell divisions, resulting in four daughter cells each with half the number of chromosomes as the original parent cell. The major difference between mitosis and meiosis is that mitosis maintains chromosome number while meiosis halves the chromosome number.
Cell division
The document discusses cell division and the cell cycle. It begins by outlining the key phases of the cell cycle - interphase, mitosis, and cytokinesis. Interphase is further broken down into the G1, S, and G2 phases where the cell grows and duplicates its contents. Mitosis is the phase where the cell nucleus divides into two identical nuclei. Cytokinesis then divides the cytoplasm into two daughter cells. The document also discusses DNA structure and replication, noting the double helix structure and enzymes involved in duplicating DNA. Abnormal cell division can lead to diseases like cancer if the cell cycle is not properly controlled.
Cell Cycle
The document discusses the cell cycle and cell division. It describes the main stages of the cell cycle including interphase (G1, S, G2 phases) and the mitotic (M) phase. Interphase involves cell growth and DNA replication, while mitosis involves nuclear division and cytokinesis. The stages of mitosis (prophase, metaphase, anaphase, telophase) and cytokinesis are explained. Control mechanisms ensure the cell cycle proceeds normally and discusses how cancer can occur if this control is disrupted.
Cellular reproduction ppt
Cells reproduce through mitosis or meiosis. Mitosis produces two identical daughter cells and is used for growth and tissue repair. Meiosis produces gametes (eggs and sperm) with half the number of chromosomes and involves two cell divisions. This ensures genetic variation in the offspring. Gametogenesis refers to the specific process of gamete formation, which is spermatogenesis in males and oogenesis in females.
Cell differentiation
Cell differentiation begins with undifferentiated cells that can become any cell type. Gene expression and environmental signals determine each cell's specialization. While all cells contain the same DNA, different genes are activated in different cell types. Specialized cells like nerve, muscle, and blood cells have unique structures and functions. Stem cells can renew themselves and differentiate into specialized cell types, making them useful for research and medical applications like treating disease and injury. Embryonic stem cells come from embryos and adult stem cells reside in tissues, with induced pluripotent stem cells generated from adult cells.
Cell Division
The document discusses different types of cell division: binary fission, mitosis, and meiosis. Binary fission is how prokaryotic cells divide, splitting their single DNA strand to form two identical daughter cells. Mitosis and meiosis are forms of cell division in eukaryotes. Mitosis produces two identical daughter cells through the phases of interphase, prophase, metaphase, anaphase and telophase. Meiosis involves two cell divisions and results in four haploid cells with half the normal genetic material.
Meiosis and its different stages
The slides contain all about meiosis. in this slides i collected all information about meiosis. which is useful for everyone.
so watch these slides and comment for any problems.
thanks
Meiosis
Meiosis is a two-step cell division process that produces gametes with half the normal number of chromosomes. It consists of Meiosis I, which separates homologous chromosome pairs, and Meiosis II, which separates sister chromatids. This results in four haploid daughter cells from one original diploid cell. The document provides details on the stages of meiosis, including prophase I with chromosome pairing and crossing over, and discusses how meiosis contributes to genetic diversity.
Natural selection
Natural selection occurs through a struggle for existence where individuals compete for limited resources. Those best suited to the environment will survive and pass on their genes, while others will die without reproducing. Over generations, this process of natural selection can cause populations to evolve and change through descent with modification from ancestral species. Key mechanisms include adaptation, fitness, and common descent of all living things from shared ancestors. Evidence for evolution comes from the fossil record, geographic distribution, homologous structures, vestigial organs, and comparative genetics.
0801 cell cycle
Mitosis and the cell cycle are necessary for three key reasons:
1. Asexual reproduction, as seen in binary fission in bacteria.
2. To replace damaged or dead cells through growth and development.
3. Embryonic development in organisms occurs through cell division of cells like bone marrow and frog embryos.
The Cell Cycle and Cell Division
Continuation of the cell structure and function. This presentation highlights the cell cycle and concentrate on how cell division occur and the steps involved in cell dividing.
2018/2019
Cell Cycle and Cell Division
This presentation explains the topic of CELL CYCLE and CELL DIVISION.
It includes cell mitosis of both Plant cell and Animal cell with labelled diagrams.
Natural selection
The document summarizes Darwin's theory of natural selection. It explains the key factors of Darwinism: rapid multiplication of organisms, limited environmental resources causing competition, variation between individuals, and survival and inheritance of beneficial traits. Through this process of natural selection over generations, species gradually change and new species may form as variations accumulate. The theory helped explain the evolution of species and adaptation to the environment. It contrasts with Lamarckism in its view of inheritance and lack of internal forces driving evolution.
Control of cell cycle
INTRODUCTION
Definition
history
DIFFERENT PHASE
G0 PHASE
INTERPHASE
M PHASE
CHECKPOINT
HOW DOES IT WORK
Inhibitors
Mechanism of action
Function
CONCLUSION
references
The origin and evolution of life on earth
The document discusses the origin and evolution of life on Earth from its earliest beginnings. It describes how early Earth conditions like primordial soup, meteorite impacts, and undersea vents could have facilitated the formation of simple organic molecules and polymers. The RNA world hypothesis proposes that self-replicating RNA arose first before DNA and proteins, as evidence shows some RNA can function as enzymes. The emergence of life is now seen as an inevitable consequence of cosmic evolution and the fundamental laws of physics given the right conditions over billions of years.
Mitosis
- Cells divide through the process of mitosis in order to grow, repair, or replace damaged cells. Mitosis results in two identical daughter cells that each receive a complete set of chromosomes.
- The cell cycle consists of interphase, where the cell grows and duplicates its DNA, and the mitotic phase, where the cell divides into two daughter cells through the stages of prophase, metaphase, anaphase and telophase, followed by cytokinesis.
- Mitosis ensures that each daughter cell receives the full complement of genetic material from the parent cell, allowing organisms to grow and maintain healthy tissues through cell replacement.
Meiosis, Crossing Over
Meiosis is a cell division process that produces gametes (sex cells) with half the number of chromosomes. During meiosis, homologous chromosomes pair up and may exchange DNA segments through a process called crossing over. Crossing over increases genetic diversity and helps ensure balanced distribution of chromosomes in gametes. It occurs during prophase I through the formation of chiasmata between nonsister chromatids. Crossing over plays an important role in evolution by allowing independent assortment of genetic variants on chromosomes.
Selective breeding powerpoint
Here are some potential implications of selective breeding for each area of concern:
1. Ecosystems - Domesticated species may become invasive if they escape and outcompete native species. Monocultures may lack resilience.
2. Genetic biodiversity - Narrowing of gene pool over time from focusing on few traits. Increased inbreeding depression. Loss of genetic variation makes populations more vulnerable.
3. Health/survival of individuals - Some breeds may experience health/welfare issues from being bred for extreme traits. Requires intervention like C-sections.
4. Survival of populations - Reliance on humans for care/breeding. Loss of ability to survive without human intervention if reintroduced to wild
Cell cycle ppt.
a deeply explained process of cell division, for understanding it thoroughly. i tried to put in all the information i knew and collected. i hope it is helpful or you.
Meiosis
Meiosis is the process by which diploid cells in organisms undergo two cell divisions to produce four haploid gametes. In meiosis I, homologous chromosomes pair up and undergo crossing over, then separate so each daughter cell has one of each type of chromosome. Meiosis II then separates the sister chromatids, resulting in four haploid cells each containing one set of chromosomes. This allows for genetic variation between gametes and offspring through independent assortment of chromosomes and new combinations from crossing over during meiosis I.
INCOMPLETE DOMINANCE VS CO-DOMINANCE
Incomplete dominance results in a blending of the dominant and recessive alleles such that the phenotype is intermediate between the two pure phenotypes. Codominance results in both alleles being fully expressed together in the heterozygote such that the phenotype shows a combination of both. Examples include snapdragons that are pink when heterozygous for red and white alleles under incomplete dominance, and human blood types that are type AB when heterozygous for the A and B alleles under codominance.
Mitosis ppt
The document summarizes the cell cycle and cell division. It discusses the key phases of the cell cycle including interphase and mitosis. Interphase consists of G1, S, and G2 phases where the cell grows and duplicates its DNA. Mitosis is the phase where the cell divides into two identical daughter cells through several stages: prophase, metaphase, anaphase, and telophase. Chromosomes duplicate and separate equally into the two daughter cells, ensuring each receives a complete copy of the genetic material.
chromosomal mutation
Chromosomal mutations are changes in chromosome structure or number that can be caused by physical or chemical agents. There are two main types of chromosomal mutations: structural changes including deletions, duplications, translocations, and inversions, and numerical changes such as aneuploidy where there is an excess or deficiency of a single chromosome. Examples of aneuploidies in humans are Down syndrome, Edward syndrome, and Patau syndrome. Chromosomal mutations can have varying effects depending on the genes involved, from no symptoms to developmental delays or medical conditions.
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The document discusses fashion trends of the 1970s compared to modern fashion. In the 1970s, hippie fashion was popular defined by loose, flowing clothes in bright colors. Women wore very short skirts and leather boots. Fashion today is seen as more varied with a mix of styles including hipster, gothic and rapper influences. While 1970s fashion was daring, today's fashion allows for more individual expression and variety in styles.
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Cellular reproduction ppt
Cells reproduce through mitosis or meiosis. Mitosis produces two identical daughter cells and is used for growth and tissue repair. Meiosis produces gametes (eggs and sperm) with half the number of chromosomes and involves two cell divisions. This ensures genetic variation in the offspring. Gametogenesis refers to the specific process of gamete formation, which is spermatogenesis in males and oogenesis in females.
Cell differentiation
Cell differentiation begins with undifferentiated cells that can become any cell type. Gene expression and environmental signals determine each cell's specialization. While all cells contain the same DNA, different genes are activated in different cell types. Specialized cells like nerve, muscle, and blood cells have unique structures and functions. Stem cells can renew themselves and differentiate into specialized cell types, making them useful for research and medical applications like treating disease and injury. Embryonic stem cells come from embryos and adult stem cells reside in tissues, with induced pluripotent stem cells generated from adult cells.
Cell Division
The document discusses different types of cell division: binary fission, mitosis, and meiosis. Binary fission is how prokaryotic cells divide, splitting their single DNA strand to form two identical daughter cells. Mitosis and meiosis are forms of cell division in eukaryotes. Mitosis produces two identical daughter cells through the phases of interphase, prophase, metaphase, anaphase and telophase. Meiosis involves two cell divisions and results in four haploid cells with half the normal genetic material.
Meiosis and its different stages
The slides contain all about meiosis. in this slides i collected all information about meiosis. which is useful for everyone.
so watch these slides and comment for any problems.
thanks
Meiosis
Meiosis is a two-step cell division process that produces gametes with half the normal number of chromosomes. It consists of Meiosis I, which separates homologous chromosome pairs, and Meiosis II, which separates sister chromatids. This results in four haploid daughter cells from one original diploid cell. The document provides details on the stages of meiosis, including prophase I with chromosome pairing and crossing over, and discusses how meiosis contributes to genetic diversity.
Natural selection
Natural selection occurs through a struggle for existence where individuals compete for limited resources. Those best suited to the environment will survive and pass on their genes, while others will die without reproducing. Over generations, this process of natural selection can cause populations to evolve and change through descent with modification from ancestral species. Key mechanisms include adaptation, fitness, and common descent of all living things from shared ancestors. Evidence for evolution comes from the fossil record, geographic distribution, homologous structures, vestigial organs, and comparative genetics.
0801 cell cycle
Mitosis and the cell cycle are necessary for three key reasons:
1. Asexual reproduction, as seen in binary fission in bacteria.
2. To replace damaged or dead cells through growth and development.
3. Embryonic development in organisms occurs through cell division of cells like bone marrow and frog embryos.
The Cell Cycle and Cell Division
Continuation of the cell structure and function. This presentation highlights the cell cycle and concentrate on how cell division occur and the steps involved in cell dividing.
2018/2019
Cell Cycle and Cell Division
This presentation explains the topic of CELL CYCLE and CELL DIVISION.
It includes cell mitosis of both Plant cell and Animal cell with labelled diagrams.
Natural selection
The document summarizes Darwin's theory of natural selection. It explains the key factors of Darwinism: rapid multiplication of organisms, limited environmental resources causing competition, variation between individuals, and survival and inheritance of beneficial traits. Through this process of natural selection over generations, species gradually change and new species may form as variations accumulate. The theory helped explain the evolution of species and adaptation to the environment. It contrasts with Lamarckism in its view of inheritance and lack of internal forces driving evolution.
Control of cell cycle
INTRODUCTION
Definition
history
DIFFERENT PHASE
G0 PHASE
INTERPHASE
M PHASE
CHECKPOINT
HOW DOES IT WORK
Inhibitors
Mechanism of action
Function
CONCLUSION
references
The origin and evolution of life on earth
The document discusses the origin and evolution of life on Earth from its earliest beginnings. It describes how early Earth conditions like primordial soup, meteorite impacts, and undersea vents could have facilitated the formation of simple organic molecules and polymers. The RNA world hypothesis proposes that self-replicating RNA arose first before DNA and proteins, as evidence shows some RNA can function as enzymes. The emergence of life is now seen as an inevitable consequence of cosmic evolution and the fundamental laws of physics given the right conditions over billions of years.
Mitosis
- Cells divide through the process of mitosis in order to grow, repair, or replace damaged cells. Mitosis results in two identical daughter cells that each receive a complete set of chromosomes.
- The cell cycle consists of interphase, where the cell grows and duplicates its DNA, and the mitotic phase, where the cell divides into two daughter cells through the stages of prophase, metaphase, anaphase and telophase, followed by cytokinesis.
- Mitosis ensures that each daughter cell receives the full complement of genetic material from the parent cell, allowing organisms to grow and maintain healthy tissues through cell replacement.
Meiosis, Crossing Over
Meiosis is a cell division process that produces gametes (sex cells) with half the number of chromosomes. During meiosis, homologous chromosomes pair up and may exchange DNA segments through a process called crossing over. Crossing over increases genetic diversity and helps ensure balanced distribution of chromosomes in gametes. It occurs during prophase I through the formation of chiasmata between nonsister chromatids. Crossing over plays an important role in evolution by allowing independent assortment of genetic variants on chromosomes.
Selective breeding powerpoint
Here are some potential implications of selective breeding for each area of concern:
1. Ecosystems - Domesticated species may become invasive if they escape and outcompete native species. Monocultures may lack resilience.
2. Genetic biodiversity - Narrowing of gene pool over time from focusing on few traits. Increased inbreeding depression. Loss of genetic variation makes populations more vulnerable.
3. Health/survival of individuals - Some breeds may experience health/welfare issues from being bred for extreme traits. Requires intervention like C-sections.
4. Survival of populations - Reliance on humans for care/breeding. Loss of ability to survive without human intervention if reintroduced to wild
Cell cycle ppt.
a deeply explained process of cell division, for understanding it thoroughly. i tried to put in all the information i knew and collected. i hope it is helpful or you.
Meiosis
Meiosis is the process by which diploid cells in organisms undergo two cell divisions to produce four haploid gametes. In meiosis I, homologous chromosomes pair up and undergo crossing over, then separate so each daughter cell has one of each type of chromosome. Meiosis II then separates the sister chromatids, resulting in four haploid cells each containing one set of chromosomes. This allows for genetic variation between gametes and offspring through independent assortment of chromosomes and new combinations from crossing over during meiosis I.
INCOMPLETE DOMINANCE VS CO-DOMINANCE
Incomplete dominance results in a blending of the dominant and recessive alleles such that the phenotype is intermediate between the two pure phenotypes. Codominance results in both alleles being fully expressed together in the heterozygote such that the phenotype shows a combination of both. Examples include snapdragons that are pink when heterozygous for red and white alleles under incomplete dominance, and human blood types that are type AB when heterozygous for the A and B alleles under codominance.
Mitosis ppt
The document summarizes the cell cycle and cell division. It discusses the key phases of the cell cycle including interphase and mitosis. Interphase consists of G1, S, and G2 phases where the cell grows and duplicates its DNA. Mitosis is the phase where the cell divides into two identical daughter cells through several stages: prophase, metaphase, anaphase, and telophase. Chromosomes duplicate and separate equally into the two daughter cells, ensuring each receives a complete copy of the genetic material.
chromosomal mutation
Chromosomal mutations are changes in chromosome structure or number that can be caused by physical or chemical agents. There are two main types of chromosomal mutations: structural changes including deletions, duplications, translocations, and inversions, and numerical changes such as aneuploidy where there is an excess or deficiency of a single chromosome. Examples of aneuploidies in humans are Down syndrome, Edward syndrome, and Patau syndrome. Chromosomal mutations can have varying effects depending on the genes involved, from no symptoms to developmental delays or medical conditions.
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The document discusses the process of mitosis and how it differs between plants and animals. Mitosis is the process where the nucleus divides to form two new nuclei. In animals, mitosis involves the formation of centrioles and spindle fibers that pull sister chromatids apart. In plants, centrioles are not present and cell division involves plant-specific structures. The stages of mitosis - interphase, prophase, metaphase, anaphase, telophase, and cytokinesis - result in two daughter cells with identical chromosomes to the parent cell.
2015 Mitosis
Cell division occurs through the process of mitosis in somatic cells. Mitosis involves five phases - interphase, prophase, metaphase, anaphase, and telophase. During interphase, the cell grows and DNA is duplicated in preparation for division. In prophase, chromosomes condense and the mitotic spindle begins to form. Metaphase sees chromosomes aligned at the center. Anaphase involves the separation of sister chromatids to opposite sides. Finally, in telophase, division is complete and two identical daughter cells have formed, each with the full complement of chromosomes. Mitosis results in the reproduction of body cells for growth and tissue repair.
Mitosis ppt
Mitosis is the process by which a cell nucleus divides to form two daughter nuclei. In animals, mitosis results in two identical daughter cells. In plants, mitosis is followed by cytokinesis which divides the cytoplasm and cell membrane, resulting in two new daughter cells each with their own nucleus. The key differences are that plant cell mitosis is closed, occurring within the cell wall, while animal cell mitosis is open, dividing the cytoplasm between the two new cells.
Fission and mitosis
The document discusses how multicellular organisms grow. It states that growth occurs through cell division, not by individual cells increasing in size. It also notes that for binary fission to occur in bacteria, the cell must grow in size and duplicate its DNA so that each new cell has its own copy.
Mitosis ppt
The document discusses cell reproduction through mitosis and its stages. It describes the stages of interphase, prophase, metaphase, anaphase and telophase. During interphase, the cell grows and duplicates its DNA. In prophase, the nuclear envelope breaks down and spindle fibers form. In metaphase, chromosomes align in the center. In anaphase, chromosomes separate. In telophase, new nuclear envelopes form around separated chromosomes. Cytokinesis then divides the cell into two daughter cells.
Cell division
The document describes the process of mitosis in eukaryotic cells. Mitosis is the part of the cell cycle where a cell divides into two identical daughter cells. It involves five main phases - prophase, prometaphase, metaphase, anaphase, and telophase. During these phases, the chromosomes condense and duplicate, then separate and move to opposite sides of the cell before new nuclear membranes form, dividing the cell into two identical daughter cells each with the same genetic information. Mitosis allows organisms to grow and repair themselves by dividing cells.
Mitosis P P T
Cell division through mitosis and cytokinesis allows cells to grow, repair, and replace damaged or old cells. Mitosis is the process of nuclear division, where the cell duplicates its DNA and separates the chromosomes, while cytokinesis divides the cytoplasm and cell membrane, forming two daughter cells each with identical genetic material. Mitosis consists of interphase, prophase, metaphase, anaphase, telophase, and is followed by cytokinesis to complete cell division.
Mitosis ppt
Little elephants grow up to be big elephants through the process of cell division and growth over time. Cell division occurs through mitosis, which has four main phases - interphase, prophase, metaphase, anaphase, and telophase. During interphase, the cell grows in size and duplicates its DNA in S phase in preparation for division. The cell then enters prophase where the chromatin coils and the spindle fibers form. In metaphase the chromosomes align in the center before separating in anaphase and moving to opposite ends. Finally in telophase two daughter cells form each with a full set of chromosomes. Through repeated mitosis, cells can continue to grow and specialize, allowing baby elephants to become fully grown
Cell reproduction
The document discusses the cell cycle and cell reproduction. It describes the main stages as interphase, where the cell grows and prepares for division, and the M phase where the nucleus and cell divide. Interphase includes the G1, S, and G2 phases where the cell makes proteins, organelles and replicates DNA. The M phase consists of mitosis, where the nucleus divides, and cytokinesis, where the cell splits into two. Mitosis is further broken down into the prophase, metaphase, anaphase and telophase stages where the chromosomes align and separate. Cytokinesis differs in animal and plant cells in how the cell membrane pinches or a cell plate forms to divide the cell. The result of
MITOSIS PPT.pptx
The cell cycle is the series of growth and division steps that cells undergo. It includes interphase, where the cell grows and duplicates its DNA, and mitosis, where the cell separates its DNA and divides into two daughter cells. Interphase consists of G1 phase, S phase where DNA replicates, and G2 phase. Mitosis then occurs in four phases - prophase, metaphase, anaphase and telophase - where the duplicated chromosomes separate and the cell divides. Cytokinesis then divides the cytoplasm, forming two new identical daughter cells to complete the cell cycle.
Cell reproduction
The document provides an overview of cell division through mitosis and meiosis. It discusses the key differences between the two types of cell division, including that mitosis produces two identical daughter cells while meiosis results in four unique haploid cells. The stages of each type of cell division are described in detail, from interphase and prophase to cytokinesis. Meiosis specifically involves two divisions - meiosis I and meiosis II - and produces gametes through spermatogenesis and oogenesis.
8. cell division.ppt
This document provides an overview of cell division, including the two main types - somatic cell division and reproductive cell division. Somatic cell division, via mitosis, produces two identical cells to replace dead or damaged cells. Reproductive cell division, via meiosis, produces gametes and reduces the chromosome number by half. Mitosis and meiosis are then described in more detail, outlining their key phases and processes. The role of cell division in development and growth is also mentioned.
Cell division
Cell division occurs through binary fission in prokaryotes, where the genetic material duplicates and the cell splits into two identical daughter cells. Eukaryotes undergo the more complex processes of mitosis and meiosis. Mitosis produces two identical daughter cells during normal cell growth and replacement. Meiosis results in four haploid cells through two cell divisions, reducing the chromosome number by half and allowing for genetic variation in sexual reproduction.
Chapter 8 Cellular Reproduction
The document summarizes key aspects of cellular reproduction and the cell cycle. It discusses how all cells come from preexisting cells through cellular reproduction, which involves growth, DNA replication, and cell division. The cell cycle is described in detail, including the three stages of interphase (G1, S, G2) and the four stages of mitosis (prophase, metaphase, anaphase, telophase). Critical cell cycle checkpoints are mentioned to control the orderly progression of the cycle. The role of both internal and external signals in regulating the cell cycle is also highlighted. Cancer is characterized as a disease resulting from dysregulation of the normal cell cycle controls.
Cell Division and Mitosis (4.1)
Cell division through mitosis or asexual reproduction is an important process that allows for the growth, repair and replacement of cells. Mitosis results in two daughter cells that are identical to the original parent cell. It occurs in a series of steps: interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. This process allows for the growth of organisms and replacement of worn out cells while maintaining identical genetic material. Other forms of asexual reproduction in cells that lack a nucleus include binary fission in bacteria and budding in hydra.
Presentaion mitosis and meiosis
This presentation is a modified from the pre-existing presentations. Mitosis and Meiosis from teachers
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Senior High School Material Mitosis an Asexual Reproduction.ppt
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�
(
�
−
�
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∼
0.9
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19
,
000
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2
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000
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≲
1
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Λ
CDM. Therefore unlike low-
�
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�
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Mitosis plant & animal
- 1. 1 1 Asexual Reproduction Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals?
- 2. How do little elephants grow up to be BIG elephants?
- 4. The process of asexual reproduction begins after a sperm fertilizes an egg.
- 5. Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly.
- 6. Mitosis Cycle • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis
- 7. • Chromosomes are copied (# doubles) • Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANENucleus Cytoplasm
- 8. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
- 9. • Mitosis begins (cell begins to divide) • Centrioles (or poles) appear and begin to move to opposite end of the cell. • Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers
- 10. Animal Cell Plant Cell Spindle fibers Centrioles
- 11. • Chromosomes (or pair of chromatids) attach to the spindle fibers. Centrioles Spindle fibers
- 12. Animal Cell Plant Cell
- 13. • Chromosomes (or pair of chromatids) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers
- 14. Animal Cell Plant Cell
- 15. • Two new nuclei form. • Chromosomes appear as chromatin (threads rather than rods). • Mitosis ends. NucleiNuclei Chromatin
- 16. Animal Cell Plant Cell
- 17. • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.
- 18. Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
- 19. Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
- 20. 21
Editor's Notes
- A mnemonic to help remember the stages of mitosis.