Crossing over takes place during _____ A. pachytene B. zygotene

crossing-over-takes-place-during-a-pachytene-b-zygotene

Crossing over takes place during _____

A. pachytene

B. zygotene

C. leptotene

D. diplotene

This question was posed to me during an internship interview.

This interesting question is from Cell Cycle and Division topic in section Cell Cycle and Cell Division of Biology – Class 11

Correct answer is A. pachytene

To explain: Crossing over takes place after tetrad or bivalent formation by the process of synapsis during zygotene. Hence, crossing over takes place during pachytene. Crossing over leads to genetic diversity.