Cell division occurs through mitosis, which produces two identical daughter cells from one parent cell. Mitosis involves several phases - prophase, metaphase, anaphase, and telophase. During prophase, the chromosomes condense and the mitotic spindle forms. In metaphase, the chromosomes line up along the center of the cell. Anaphase involves the sister chromatids being pulled apart by the mitotic spindle to opposite poles. Finally, in telophase, a membrane forms around each set of chromosomes, dividing the cell into two identical daughter cells each with their own nucleus.
It is the presentation on the MEIOSIS phase of the Cell division.
It includes all the details and definitions that are related to the topic of meiosis with the labelled diagrams.
If you have any query or a question, you may ask in the comment box.
thanks.
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.
It is the presentation on the MEIOSIS phase of the Cell division.
It includes all the details and definitions that are related to the topic of meiosis with the labelled diagrams.
If you have any query or a question, you may ask in the comment box.
thanks.
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.
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
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
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
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
The study of the cell cycle focuses on mechanisms that regulate the timing and frequency of DNA duplication and cell division. As a biological concept, the cell cycle is defined as the period between successive divisions of a cell. During this period, the contents of the cell must be accurately replicated.
The cell cycle is regulated by cyclins and cyclin-dependent kinases.
How long is one cell cycle?
Depends. Eg. Skin cells every 24 hours. Some bacteria every 2 hours. Some cells every 3 months. Cancer cells very short. Nerve cells never.
Programmed cell death:
Each cell type will only do so many cell cycles then die. (Apoptosis)
Helpful for understanding the mitosis with some live images and short and simple description of prophase, metaphase, anaphase, telophase and cytokinesis
Ethnobotany and Ethnopharmacology:
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Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Palestine last event orientationfvgnh .pptxRaedMohamed3
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Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
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Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
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Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
1. Cell Division
Dr. Pratibha Bisen
Dept. Plant Breeding & Genetics
College of Agriculture, Balaghat
JNKVV Jabalpur (M.P.)
2. Cell Division
In unicellular organisms, cell division is the means of reproduction; in
multicellular organisms, it is the means of tissue growth and maintenance.
Every day, every hour, every second one of the most important events in
life is going on in your body—cells are dividing.
A single cell divides to make two cells and these two cells then divide to
make four cells, and so on. We call this process "cell division" and "cell
reproduction," because new cells are formed when old cells divide.
3. Mitosis Cell Division
The process of mitosis, or cell division, is also known as the M phase. This is
where the cell divides its previously-copied DNA and cytoplasm to make two
new, identical daughter cells.
Mitosis is how somatic—or non-reproductive cells—divide. Somatic cells
make up most of your body's tissues and organs, including skin, muscles, lungs,
gut, and hair cells. Reproductive cells (like eggs) are not somatic cells.
In mitosis, the important thing to remember is that the daughter cells each
have the same chromosomes and DNA as the parent cell.
The daughter cells from mitosis are called diploid cells. Diploid cells have two
complete sets of chromosomes.
Since the daughter cells have exact copies of their parent cell's DNA, no
genetic diversity is created through mitosis in normal healthy cells.
5. The Mitotic Spindle
Spindle fibers form a protein structure that divides the genetic material in
a cell.
The spindle is necessary to equally divide the chromosomes in a parental
cell into two daughter cells during both types of nuclear division: mitosis
and meiosis.
During mitosis, the spindle fibers are called the mitotic spindle.
Meanwhile, during meiosis, the spindle fibers are referred to as the meiotic
spindle.
At the beginning of nuclear division, two wheel-shaped protein structures
called centrioles position themselves at opposite ends of the cell forming
cell poles.
Long protein fibers called microtubules extend from the centrioles in all
possible directions, forming what is called a spindle.
Some of the microtubules attach the poles to the chromosomes by
connecting to protein complexes called kinetochores.
6. The Mitotic Spindle
Kinetochores are protein formations that develop on each chromosome
around the centromere, which is a region located near the middle of a
chromosome. Other microtubules bind to the chromosome arms or extend
to the opposite end of the cell.
7. Prophase
The formation of spindle and chromosomes condense into X-shaped
structures that can be easily seen under a microscope.
Each chromosome is composed of two sister chromatids, containing
identical genetic information.
The chromosomes pair up so that both copies of chromosome 1 are
together, both copies of chromosome 2 are together, and so on.
At the end of prophase the membrane around the nucleus in the cell
dissolves away releasing the chromosomes.
The mitotic spindle, consisting of the microtubules and other proteins,
extends across the cell between the centrioles as they move to opposite
poles of the cell.
8.
9. Metaphase
The chromosomes line up neatly end-to-end along the centre
(equator) of the cell.
The centrioles are now at opposite poles of the cell with the mitotic
spindle fibres extending from them.
The mitotic spindle fibres attach to each of the sister chromatids.
10.
11. Anaphase
The sister chromatids are then pulled apart by the mitotic spindle which pulls
one chromatid to one pole and the other chromatid to the opposite pole.
12. Telophase
At each pole of the cell a full set of chromosomes gather together.
A membrane forms around each set of chromosomes to create two
new nuclei.
The single cell then pinches in the middle to form two separate
daughter cells each containing a full set of chromosomes within a
nucleus. This process is known as cytokinesis.