alleryCrossing over occurs during which stage of meiosis?
AMetaphase II (typical)
BAnaphase II
CPachytene of prophase I
DTelophase I
Answer & Solution
Correct answer: C. Pachytene of prophase I
1. Crossing over involves reciprocal exchange of chromatid segments between non-sister homologous chromatids.
2. It happens after pairing (zygotene) at the pachytene sub-stage of prophase I.
3. It is the cytological basis of recombination.
_Source: Maharashtra Balbharati Std XII Biology, Ch 3 "Inheritance and Variation" §3.8_
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