alleryCrossing over between homologous chromosomes occurs in which sub-stage?
ALeptotene of prophase I
BMetaphase I, while chromosomes line up
CPachytene of prophase I, after synapsis
DAnaphase II, while chromatids separate
Answer & Solution
Correct answer: C. Pachytene of prophase I, after synapsis
Crossing over happens in pachytene, AFTER homologues pair up in zygotene (synapsis) and BEFORE they start to separate in diplotene.
The visible result is chiasmata in diplotene.
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