Question

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of mitosis, if the number of chromosomes at G1​ phase is 8, what would be the number of chromosomes after S phase?

• A. 4
• B. 8
• C. 32
• D. 16

Answer 1

The correct option is B

8

The correct option is B.

Explanation of correct option:

1. During S phase of mitosis, the cells synthesises and replicates the DNA.
2. The amount of DNA is doubled during this phase while the number of chromosomes remains constant.
3. So, if the number of chromosomes at G1 phase is 8 then it will also remain 8 in S phase.

Final answer: The fruit fly has 8 chromosomes (2n) in each cell. During interphase of mitosis, if the number of chromosomes at G1​ phase is 8, what would be the number of chromosomes after S phase is also 8.