Although life originally started with mitosis, a biological need for meiosis still arose. Mitosis originally began before meiosis, because the organisms that are needed to reproduce were much smaller and less complex. On the other hand, meiosis is sexual reproduction. We need meiosis because it would be very important if we only had mitosis, then the cells would never "change". This is due to the fact that meiosis takes a random combination of genetic material from both parents while mitosis only splits the parent cell into two identical copies. The process of meiosis produces a total result of four cells that each contain different genes. Even though meiosis is the way humans that reproduce, mitosis is still used in humans to repair it. Now, your body uses both processes, mitosis, for internal repairing, and meiosis, to produce sex cells.
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AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
May 2014
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