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Cell cycle, mitosis, and meiosis

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Dr. Thomas John McCloughlin

on 27 October 2017

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Transcript of Cell cycle, mitosis, and meiosis

Relevancies
Growth, repair,
tissue formation, including cancer, and
asexual & sexual reproduction
What is mitosis exactly?
Cytokinesis
Mitosis
Prophase
The cell cycle describes the life cycle of a single-celled organism including its asexual reproduction.
The Cell Cycle
In multicellular organisms...
The Cell Cycle describes the process of growth and repair. It is also the process that does not work correctly when cancer tumours arise and grow. Cell lines, e.g., HeLa 'reproduce' through mitosis.
The Cell Cycle, Mitosis,
and Meiosis

Prometaphase
Metaphase
Anaphase
Telophase
Cytokinesis
Interphase
What is meiosis exactly?
MITOSIS
MEIOSIS
THE CELL CYCLE
Some scientists ask: "Did meiosis develop from mitosis or exist as a form of cell reproduction in its own right at any stage?" Some scientists 'speculate' that certain protists which have a primitive form of meiosis e.g.
Giardia intestinalis
indicates that such a system may have been present in the common unicellular ancestor. Using a modern organism to argue for a situation of billions of years ago as a survivor as opposed to all other lifeforms and then dismiss the argument that life has not changed utterly is 'problematic'.
Development of meiosis
Thomas McCloughlin
Full transcript