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Q.
The fruit fly has $8$ chromosomes $(2 n)$ 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?
During mitotic cell cycle if the chromosome number in $G _{1}$ phase is $8$ , it remains same till Metaphase. Hence, even after $S$ phase same chromosome number $8$ is maintained in the cell of fruit fly.