Question

D Question 5 2 pts If a cell with 2n-28 chromosomes under goes mitosis, how many chromosomes are present in metaphase? 28 56 7 0 0 14

Answer 1

Answer-

The number of chromosomes in metaphase stage of mitosis will be 28

Mitosis involves the exact replication of parent cell followed by its division into two daughter cells which are identical and contain the same number of chromosomes as found in the parent cell.

Before entering mitosis cell division process, cell experiences interphase, which is the interval period between two successive cell divisions. During interphase, DNA contents replicate to form two daughter DNA, which is known as sister chromatids. So, prior to mitosis division chromosomal content doubles but number of chromosomes remain same because, two sister chromatids are attached at the centromere.

During metaphase stage, chromosomes are arranged at the equator region with the help of microtubule. Sister chromatids remain attached together at centromere.

So, in a cell with 2n = 28, the number of chromosomes = 28; but number of chromatids = 28×2 = 56