Q. The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at $G_1$ phase is 8, what would be the number of chromosomes after S phase?
A) 16
B) 4
C) 32
D) 8
Explanation
[Solution] S phase doubles the DNA content but not the chromosome number, which stays 8. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.