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Why do sex cells only need half the number of chromosomes compared to other cells in a organism?

User Jason Shave
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Answer:

Since a species' chromosome count doesn't change from generation to generation, meiosis requires that the number of chromosomes in germ cells be cut in half. Meiosis, unlike mitosis, achieves this accomplishment by requiring a single round of DNA replication followed by two rounds of cell division.

User Behzad
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