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yulyashka [42]
3 years ago
5

Crossing over occurs when

Biology
1 answer:
wlad13 [49]3 years ago
7 0
During meiosis crossing over occurs at the pachytene stage, when homologous chromosomes are completely paired. At diplotene, when homologs separate, the sites of crossing over become visible as chiasmata, which hold the two homologs of a bivalent tighter until segregation at anaphase.
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