2 years ago

Crossing over occurs when

Biology

2 answers:

Zanzabum2 years ago

5 0

The correct answer to this question is B: homologous chromosomes join together to form tetrads during prophase I.

balandron [24]2 years ago

3 0

During meiosis 1, prophase 1 Each chromosome form tetrads and and become more and more condensed. This is when crossing over occurs. So your answer is B.

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