Question

Fill the blanks correctly.

Chromosomes duplicate during A and an increase in the number of chromosomes is observed first during B .

• A. A - Interphase, B - Prophase
• B. A - S-phase, B - Telophase
• C. A - Synthetic phase, B - Gap 2 phase
• D. A - Interphase. B - Anaphase

Answer 1

Answer: (D)

A - Interphase. B - Anaphase

• During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells.
• Before the cells can enter the active phases of mitosis, however, it must go through a period known as interphase, during which it grows and produces the various proteins necessary for the division.
• Prophase is the first phase of mitosis. During the phase, the chromosomes inside the cell's nucleus condense and become visible for the first time during the cell cycle. But, the number of chromosomes can be observed clearly and distinguishably firstly during the anaphase.

So the correct option is 'A -Interphase B- Anaphase'.