Question

Chromosomes duplicate during $\underset{–}{A}$ and increase in number of chromosomes is observed first during $\underset{–}{B}$. Fill the blanks correctly.

• A. A – Interphase B – Prophase
• B. A – S phase B – Telophase
• C. A – Synthetic phase B – $Ga{p}_2$ phase
• D. A – Interphase B - Anaphase

Answer 1

The correct option is D A – Interphase B - Anaphase

A – Interphase. Chromosomes duplicate in S phase of interphase
B – Anaphase. The number of chromosomes increases only when sister chromatids separates during anaphase of mitosis and anaphase II of meiosis II.