- A Overall chromosome condensation status during prophase
- B Synapsis completion and DNA double-strand break repair
- C Correct assembly of the meiotic spindle apparatus
- D Completion of cytoplasmic division during telophase
Correct answer: B. Synapsis completion and DNA double-strand break repair
Explanation: Pachytene checkpoint: monitors completion of synapsis and repair of meiotic DSBs (programmed by Spo11) before cells can proceed to metaphase I.
Concept context
Mitosis and meiosis: how cells divide for growth, repair, and reproduction.