This document summarizes cell division through mitosis and its role in the growth and development of eukaryotic organisms. It describes that mitosis produces two daughter cells that are identical to the original parent cell through an orderly process of DNA replication followed by nuclear and cellular division. The key stages of mitosis - prophase, metaphase, anaphase and telophase - are outlined as well as the importance of mitosis in maintaining the surface area to volume ratio of cells as organisms grow.
This presentation is about how cell cycle and cell division takes place in plant and animal cell .... and this presentation also includes mitosis and meiosis and significance of it.
This presentation is about how cell cycle and cell division takes place in plant and animal cell .... and this presentation also includes mitosis and meiosis and significance of it.
Essay Mitosis and Meiosis
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Mitosis: Interphase I And Meiosis
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Mitosis And The Phase Of Interphase Essay
Speech On Mitosis
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Embryology is literally “the study of the
embryo”. More generally it refers to
“the study of prenatal development”
Defination:
‘’The study of the process of growth and differentiation of the embryo, starting from fertilization of an ovum and progressing to a fully formed individual animal.’’
Although a mammalian body is made up of an array of organ system, tissues and individual cells which function in a highly coordinated manner but they are all derived from a single cell, fertilized ovum.
Ontogeny : stages of development of an individual
Teratology : study of abnormal development (congenital malformations)
Developmental Stages Of Embryo:
Fertilization
Cleavage
Gastrulation
Organogenesis
Maturation
CELL CYCLE
Cells associated with formation and regeneration are somatic cells and they divide through mitosis.
Cells associated with reproduction are known as germ cells including male female gametes, they divide through meiosis.
Somatic cells undergo a series of molecular and morphological changes as part of the cell cycle. The changes occur in four phases G1, S, G2, and M and also a quiescent Go phase.
G1 and G2 phase are known as resting phases. The cells are metabolically active fulfilling its requirements for the next phase of cycle.
In S phase DNA synthesis occurs before chromosomal replication.
Collectively G1,S and G2 phase form the interphase which is the preparatory phase before mitotic phase.
Certain fully differentiated cells such as neurons do not divide further and enter Go phase.
PHASES OF MITOSIS
PROPHASE: in this phase the chromatin material begins to condense in the form of chromosomes and the centrioles begin to form spindle fibers or asters.
METAPHASE: in this phase nuclear envelop breaks and microtubules developed from spindle fibers bind to kinetochore of chromatids and arrange them in middle region forming a metaphase plate.
ANAPHASE: in this phase kinetochore microtubules constrict seperating the conjoined chromatids and movig them to opposite poles.
TELOPHASE: the two groups of identical chromosomes on opposite poles de-condense and a nuclear envelope forms around both of them and it marks end of mitosis.
Essay Mitosis and Meiosis
Mitosis Key Process
Mitosis Research Paper
Cell Biology Meiosis and Mitosis
Mitosis Research Paper
Observing Mitosis
Mitosis And Meiosis Similarities
Essay on Meiosis Vs. Mitosis
Mitosis: Interphase I And Meiosis
Mitosis: A Meiosis In Diploid Cells
The Process of Mitosis Essay
Mitosis And The Phase Of Interphase Essay
Speech On Mitosis
Mitosis Case Study
Mitosis Research Paper
Lab Report On Mitosis
Mitosis And Phase Of Mitosis Essay
Compare and Contrast Mitosis and Meiosis Essay
Mitosis Lab Report
Mitosis Research Paper
Embryology is literally “the study of the
embryo”. More generally it refers to
“the study of prenatal development”
Defination:
‘’The study of the process of growth and differentiation of the embryo, starting from fertilization of an ovum and progressing to a fully formed individual animal.’’
Although a mammalian body is made up of an array of organ system, tissues and individual cells which function in a highly coordinated manner but they are all derived from a single cell, fertilized ovum.
Ontogeny : stages of development of an individual
Teratology : study of abnormal development (congenital malformations)
Developmental Stages Of Embryo:
Fertilization
Cleavage
Gastrulation
Organogenesis
Maturation
CELL CYCLE
Cells associated with formation and regeneration are somatic cells and they divide through mitosis.
Cells associated with reproduction are known as germ cells including male female gametes, they divide through meiosis.
Somatic cells undergo a series of molecular and morphological changes as part of the cell cycle. The changes occur in four phases G1, S, G2, and M and also a quiescent Go phase.
G1 and G2 phase are known as resting phases. The cells are metabolically active fulfilling its requirements for the next phase of cycle.
In S phase DNA synthesis occurs before chromosomal replication.
Collectively G1,S and G2 phase form the interphase which is the preparatory phase before mitotic phase.
Certain fully differentiated cells such as neurons do not divide further and enter Go phase.
PHASES OF MITOSIS
PROPHASE: in this phase the chromatin material begins to condense in the form of chromosomes and the centrioles begin to form spindle fibers or asters.
METAPHASE: in this phase nuclear envelop breaks and microtubules developed from spindle fibers bind to kinetochore of chromatids and arrange them in middle region forming a metaphase plate.
ANAPHASE: in this phase kinetochore microtubules constrict seperating the conjoined chromatids and movig them to opposite poles.
TELOPHASE: the two groups of identical chromosomes on opposite poles de-condense and a nuclear envelope forms around both of them and it marks end of mitosis.
A brief information about the SCOP protein database used in bioinformatics.
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heliosphere. By combining magnetic feld modelling and spectroscopic
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2b. Mitosis - PowerPoint.pdf
1. CELL DIVISION FOR GROWTH OF
EUKARYOTIC ORGANISMS AND
REPLACEMENT OF SOME
EUKARYOTIC CELLS
T H I S W O R K I S L I C E N S E D U N D E R A C R E A T I V E C O M M O N S
A T T R I B U T I O N - N O N C O M M E R C I A L - S H A R E A L I K E 4 . 0
I N T E R N A T I O N A L L I C E N S E .
Mitosis
2. History of Understanding Cancer
Rudolf Virchow (1821-1902) – First to recognize
leukemia in mid-1800s, believing that diseased tissue
was caused by a breakdown within the cell and not
from an invasion of foreign organisms.
Louis Pasteur (1822-1895) – Proved Virchow to be
correct in late 1800s.
Virchow’s understanding that cancer cells start out
normal and then become abnormal is still used today.
If cancer is the study of abnormal cell division, let’s
look at normal cell division.
3. Types of Normal Cell Division
There are two types of normal cell division – mitosis and
meiosis.
Mitosis is cell division which begins in the fertilized egg
(or zygote) stage and continues during the life of the
organism in one way or another. Each diploid (2n)
daughter cell is genetically identical to the diploid (2n)
parent cell.
Meiosis is cell division in the ovaries of the female and
testes of the male and involves the formation of egg and
sperm cells, respectively. Each diploid (2n) parent cell
produces haploid (n) daughter cells.
Meiosis will be discussed more fully in Chapter 5 of the
Oncofertility Curriculum.
4. Walther Flemming
(1843 – 1905)
• Described the process of cell
division in 1882 and coined the
word ‘mitosis’
• Also responsible for the word
“chromosome’ which he first
referred to as stained strands
• Co-worker Eduard Strasburger
named the mitotic stages
‘prophase, metaphase,
anaphase, telophase’ in 1884
http://en.wikipedia.org/wiki/File:Walther_flemming_2.jpg Public Domain
6. DNA Replication and Cell Division
DNA Replication Mitosis Result – Two Diploid
Cells Identical to the
Parent Cell
Diploid
Parent Cell
http://commons.wikimedia.org/wiki/File:Major_events_in_mitosis.svg
7. Why Do Cells Undergo Mitosis?
Mitosis is exact nuclear division. The DNA in the parent cell
is copied exactly and then the cell nucleus divides exactly so
each of the two daughter cells has the same kind and
number of genetic base pairs arranged in chromosomes as
the parent cell.
Mitosis is necessary because when cells reach a surface area
to volume ratio that is too small relative to the rate of
diffusion of nutrients and water into the cell, and thus the
nutritional demands of the cell cannot be met.
In order to address this, the cell undergoes mitosis to form
two identical, but smaller cells, which increases the surface
area to volume ratio, and thus the rate of diffusion can meet
the nutritional demands of the entire cell.
10. Prophase of Mitosis
Centrosomes
containing a
centriole pair.
The centrosome
that divided in
G2 now has two
copies and each
migrates to
opposite poles of
the cell and
forms spindle
fibers.
Chromatid
pairs
(replicated DNA
of the paternal
(green) and
maternal (red)
homologous
chromosomes)
Spindle Fiber
Microtubule
Centromeres with kinetochore on either side
where the spindle fiber will attach.
Cell Membrane
Aster
Microtubules
Drawing: Lynda Jones, MS, ONPRC
11. Kinetochore and Mitotic Spindle
https://www.boundless.com/biology/textbooks/boundless-biology-textbook/cell-reproduction-10/the-cell-cycle-88/the-mitotic-phase-and-the-
g0-phase-396-11622/images/fig-ch10_02_03 http://creativecommons.org/licenses/by-sa/4.0/ No changes were made.
12. Mitosis in an Onion Root Tip
Prophase
Metaphase
Anaphase
Telophase
Interphase
http://commons.wikimedia.org/wiki/File:Wilson1900Fig2.jpg {{PD-US}}