Spindle fibres attach to kinetochores of chromosomes during
Answer: (A) Metaphase. Answer: Metaphase Solution: At metaphase the kinetochores, small disc-shaped structures on the surface of the centromeres, serve as the sites where spindle fibres attach to the chromosomes, aligning them at the metaphase plate.
- A.Metaphase✓
- B.Anaphase
- C.Telophase
- D.Prophase
Correct Answer
(A) Metaphase
Solution & Explanation
Answer: Metaphase Solution: At metaphase the kinetochores, small disc-shaped structures on the surface of the centromeres, serve as the sites where spindle fibres attach to the chromosomes, aligning them at the metaphase plate. Spindle fibres are not yet attached in prophase, while in anaphase the chromatids have already separated and in telophase the spindle disassembles; hence metaphase is correct. NCERT Reference: Ch 10, p.123, lines 29-30 — "Spindle fibres attach to kinetochores of"