In which substage of Prophase I does synapsis (pairing of homologous chromosomes) occur?
Answer and explanation
Correct answer: D. Zygotene
- Step 1: Synapsis is the pairing of maternal and paternal homologous chromosomes facilitated by the synaptonemal complex. Step 2. This specific pairing process takes place during the zygotene stage. Answer: Zygotene. Why not the others: Leptotene precedes pairing with thread-like chromatin; pachytene is where crossing over happens; diakinesis is terminalization.
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