Question
Biology Question on Cell Cycle
What will be the DNA content and number of chromosomes in a cell, after S phase as compared to the gamete of the same organisms?
A
Same DNA content but double chromosome number
B
Four times DNA content but double chromosome number
C
Same DNA content but half chromosome number
D
Half DNA content but double chromosome number
Answer
Four times DNA content but double chromosome number
Explanation
Solution
During S phase, replication increases the DNA content of the cell from 2n to 4n, so cells in S have DNA contents ranging from 2n to 4n and the cell is still genetically diploid (2n chromosome number).