Mice (Mus musculus)have 40 chromosomes per diploid cell (2n = 40).How many double- stranded DNA molecules and how many chromosomes are there in a mouse cell that is in the G2 stage of the cell cycle?
A)40 DNA molecules and 20 chromosomes
B)40 DNA molecules and 40 chromosomes
C)40 DNA molecules and 80 chromosomes
D)80 DNA molecules and 40 chromosomes
E)80 DNA molecules and 80 chromosomes

Question

Quizplus · Accepted Answer

In G2 stage, DNA has already replicated during S phase, resulting in two identical copies of each chromosome. Thus, there are 80 double-stranded DNA molecules in the cell. However, the number of chromosomes remains the same, so there are still 40 chromosomes in the cell. Therefore, the correct answer is D) 80 DNA molecules and 40 chromosomes.

Mice (Mus Musculus)have 40 Chromosomes Per Diploid Cell (2n =