IF A NUCLEUS HAS EIGHT CHROMOSOMES DURING INTERPHASE, HOW MANY CHROMOSEOMES DOES IT HAVE DURING METAPHASE?

HOW MANY DOES IT HAVE AFTER MITOSIS IS COMPLETE?

To determine the number of chromosomes during metaphase and after mitosis, it's important to understand the process of mitosis and how chromosomes behave.

During interphase, which is the first phase of the cell cycle, the DNA replicates and the chromosomes are duplicated. So, if a nucleus has eight chromosomes during interphase, it means that there are a total of 16 chromatids (two sister chromatids for each chromosome).

During metaphase, which is the second stage of mitosis, the duplicated chromosomes line up along the middle of the cell. Each chromosome consists of two sister chromatids held together by a centromere. Therefore, the number of chromosomes remains the same during metaphase. In this case, there would still be eight chromosomes, but with each consisting of two sister chromatids, resulting in a total of 16 chromatids.

After mitosis is complete, the cell undergoes cytokinesis, where the cytoplasm divides to form two daughter cells. Each daughter cell receives an equal number of chromosomes, which is typically the same as the original cell. So, after mitosis, each daughter cell would have eight chromosomes, just like the original parent cell during interphase.

In summary:
- During interphase: 8 chromosomes (16 chromatids)
- During metaphase: 8 chromosomes (16 chromatids)
- After mitosis: 8 chromosomes in each daughter cell