Home › CBSE Class 11 (Science) › Biology › Cell Cycle and Cell Division › A diploid cell has 2n chromosomes at G1. How man…
A diploid cell has 2n chromosomes at G1. How many does it have after the S phase?
A2n (unchanged)
B4n (doubled)
Cn (halved)
D3n (tripled)
Answer & Solution
Correct answer: A. 2n (unchanged)
The S phase doubles DNA but the chromosome number stays at 2n because sister chromatids remain joined.
Related questions
Turner syndrome is caused by what chromosomal condition?Down syndrome results from which chromosomal change?Abnormal separation of chromosomes during meiosis is known as what?How do most bacteria and archaea reproduce?Which cells often stay in G0 indefinitely?Which protein helps trigger control mechanisms at the G1/S and G2/M checkpoints?The metaphase checkpoint ensures what before anaphase begins?The G1/S transition, a rate-limiting step, is also known by what name?