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Zolol [24]
3 years ago
6

Crossing over occurs between:

Biology
1 answer:
goldfiish [28.3K]3 years ago
5 0

crossing over, process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis. At that stage each chromosome has replicated into two strands called sister chromatids.

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Explanation:

Homologous chromosomes are two pieces of DNA within a diploid organism which carry the same genes, one from each parental source.

In simpler terms, both of your parents provide a complete genome. Each parent provides the same 23 chromosomes, which encode the same genes. So, our cells carry 46 total chromosomes, in two copies. However, each homologous chromosome can provide a different version of each gene. Two versions of each gene create more variety, lower the detrimental effects of negative mutations, and generally stabilize a population.

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