Crossing over rarely occurs in mitosis, unlike meiosis. Why?

1 Answer
Dr Birendra Kumar Mishra
Nov 15, 2016

Homologous pairing helps crossing over.

Explanation:

The crossing over is a mechanism of exchange of genetic materials between the homologous chromosomes. In the pachytene sub-stage of prophase-I of meiosis, homologous chromosomes are paired. It resuts reacombination of DNA. Finally, the variations help the natural selection. Thank.

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