Question

In which stage, the centromere lie at equator and arms are directed towards poles?

• A. Metaphase of mitosis
• B. Metaphase I
• C. Metaphase II
• D. Both A and C

Answer 1

The correct option is D Both A and C

A. In the metaphase of mitosis, chromosomes lie over the equator of the spindle and are organised into a plate-like structure called equatorial plate or metaphasic plate. In this plate, centromeres of the chromosomes lie over the equator, and arms of the chromosomes are directed towards the poles.

B. In Metaphase - I of meiosis, bivalents lie over the equator of the spindle. In this, centromere does not lie at equator and arms are not directed towards poles.

C. In the metaphase - II of meiosis also, chromosomes lie over the equator of the spindle, and are organised into a plate-like structure called equatorial plate or metaphasic plate. In this plate, centromeres of all chromosomes lie over the equator of the spindle, and arms are directed towards the poles.

D. Both A and C

Thus, the correct answer is 'Metaphase of mitosis and Metaphase II'.