Question

If a cell has 36 chromosomes at the beginning of G1, how many chromosomes will be present at the end of G2?

a) 36
b) 72
c) 18
d) 54

Answer 1

At the end of G2, the cell will have twice the number of chromosomes it had at the beginning of G1.

Step-by-step explanation:

In the cell cycle, a diploid cell goes through different phases, including G1 (first gap), S (synthesis), G2 (second gap), and M (mitosis). During the G1 phase, the cell prepares for DNA replication. At the beginning of G1, the cell has 36 chromosomes. In the S phase, DNA is replicated, resulting in each chromosome having two sister chromatids. Therefore, at the end of G2, the cell will have twice the number of chromosomes it had at the beginning of G1, which is 72 chromosomes. Therefore, the correct answer is b) 72.