Question

Separation of homologous chromosomes is called

• A. Dispersion
• B. Bivalent formation
• C. Disjunction
• D. Crossing over

Answer 1

Answer: (C)

Disjunction

The separation of homologous chromosomes during anaphase I is called disjunction. Disjunction forms an integral part of mitosis and meiosis (I and II) which occurs during anaphase. During the anaphase of mitosis, sister chromatids separate and move towards opposite poles of the cell. In meiosis, disjunction happens when homologous chromosomes move apart toward the opposite poles of the cell in anaphase I. Disjunction again occurs when sister chromatids separate and move away from each other during anaphase II.

So, the correct answer is option C.