chiaraaltierir
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#1
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#1
I'm doing revision for Biology AQA combined and I cannot wrap my head around mitosis and meiosis. Could someone please give some advice or help!
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Hehejsm
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#2
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Mitosis is a process where a single cell divides into two identical daughter cells (cell division).
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information
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MaiValentine
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#3
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Mitosis is associated with the somatic (non gamete) cells of the body, while Meiosis happens during sexual reproduction.
As stated earlier in the thread, mitosis produces an identical copy of the parent cell- the cell which is undergoing divison. There are 6 phases of mitosis, ending with two identical daughter cells.
Meiosis, however, consists of 12 phases and takes place during reproduction. Meiosis I involves the crossing over/recombination of two sets of chromosomes, one from each parent. The cell will split apart, much like Mitosis, and produce 2 daughter cells.
However, these cells need to divide once more in order to become haploid (having one set of chromosomes as opposed to 2) so they will undergo Meiosis 2, resulting in 4 grandaughter cells.
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