02-10-2017, 10:02 PM
(02-10-2017, 09:42 PM)Akshay shinde Wrote: In which of the following two cell cycles the chromosome number remains diploid ?
1 G1
2 G2
3 S
4 M
It's a bit confusing question....ploidy isn't supposed to change in any of the phases. It's the total DNA content that gets doubled in S phase and remains so in G2 phase. So, if by diploid, they mean the original state of cell, then it is G1 and M (because in S phase, DNA has doubled and it remains so in G2 phase as well, till daughter cells are produced in M phase).
Ideally, cell remains diploid even in S phase as it's the DNA content (in form of new chromatids) that gets doubled, not the number of chromosomes.