The separation of two chromatids of each chromosome at early anaphase is initiated by

Options

A. the interaction of centromere with the chromosomal fibres
B. the elongation of metaphasic spindle
C. the force of repulsion between the divided kinetochores
D. all of these

Answer

C

Explanation

Kinetochore is a plate-like structure by which microtubules of the spindle attach to the centromere of a chromosome during nuclear division. The centromere of each chromosome divides into two, so that each chormatied comes to have its own centromere. The two chromatids now start repelling each otherand separate completely to become daughter chromosmes. the daughter or new chromosmes. The daughter or new chromosomes move towards the poles of spindle along the path of their chromosome fibres.