Actual reduction of chromosome number occurs during
Anaphase II
Anaphase I
Mitotic anaphase
All of these
Chromosomes are separated during anaphase I while chromatids are separated during anaphase of mitosis. The number of chromosomes are reduced in anaphase I. During anaphase I, the homologous chromosomes separate from each other such that each homologous chromosome moves to the opposite poles.Hence, the correct option is (a).