Select the incorrect statement with reference to mitosis:
Answer: (B) Spindle fibres attach to centromere of chromosomes. Answer: Spindle fibres attach to centromere of chromosomes Solution: This is the incorrect statement: spindle fibres attach to the kinetochores (disc-shaped structures on the surface of the centromere), not directly to the centromere.
- A.All the chromosomes lie at the equator at metaphase
- B.Spindle fibres attach to centromere of chromosomes✓
- C.Chromosomes decondense at the telophase stage
- D.Splitting of centromere occurs at anaphase
Correct Answer
(B) Spindle fibres attach to centromere of chromosomes
Solution & Explanation
Answer: Spindle fibres attach to centromere of chromosomes Solution: This is the incorrect statement: spindle fibres attach to the kinetochores (disc-shaped structures on the surface of the centromere), not directly to the centromere. The other statements are correct — all chromosomes lie at the equator (metaphase plate) at metaphase, centromeres split at anaphase, and chromosomes decondense at telophase. NCERT Reference: Ch 10, p.123, lines 29-30 — "Spindle fibres attach to kinetochores of chromosomes"