ক্রসিং ওভার (Crossing over) কোন উপদশায় ঘটে?

A প্যাকাইটিন

B লেপ্টোটিন

C জাইগোটিন

D ডায়াকাইনেসিস

Correct Answer & Explanation

Option A

Option A is the correct answer according to official curriculum guidelines.

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