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klasskru [66]
3 years ago
13

С Е

Biology
1 answer:
Anon25 [30]3 years ago
3 0

Answer:

Crossing over

Explanation:

During prophase I of meiosis, homologous chromosomes pair to form bivalents. The chromatids of bivalents may form intimate contact points called chiasmata. At the chiasmata breakage may occur and exchange of chromatids segments between non sister chromatids may take place. This is crossing over ad results in new gene combinations causing variations.

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