Question

Assertion : Prophase is the first stage of mitosis which follows $S$ and $G_1$ phases of interphase.
Reason :: Prophase is marked by the initiation of clusters of chromosomes.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (D)

Prophasewvhich is the first stage of mitosis follows the $S$ and $G_2$ phases of interphase. In the $S$ and $G_2$ phases the new $DNA$ molecules formed are not distinct but interwined. Prophase is marked by the initiation of condensation of chromosomal material. The chromosomal material becomes untangled during the process of chromatin condensation.