If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in a G₁ cell?
A) 5
B) 10
C) 20
D) 40

Question

Quizplus · Accepted Answer

At metaphase of mitosis, the cell has 20 sister chromatids, which means it has 10 chromosomes (since there are normally 2 sister chromatids per chromosome). In a G1 cell, the chromosomes have not yet duplicated, so there is only 1 sister chromatid per chromosome. Therefore, the number of chromosomes in a G1 cell would be half of the number of sister chromatids in a metaphase cell, which is 10.

If a Cell at Metaphase of Mitosis Contains 20 Sister