Question

When observing a chicken skin cell in g2 under a microscope, you count 156 total chromatids. how many chromosomes does a male chicken have in its sperm cells?

Answer 1

A chicken skin cell in G2 would have 78 chromosomes. A male chicken's sperm cell would have 39 chromosomes, with one being the sex chromosome (Z).

Step-by-step explanation:

In a chicken skin cell in G2, 156 total chromatids are observed. Each chromatid represents a replicated copy of a chromosome. Since chromatids are duplicated copies of chromosomes, dividing the total chromatids count by 2 will give the total number of chromosomes. So, a chicken skin cell in G2 would have 78 chromosomes.

When it comes to sperm cells, the sex chromosomes of male chickens are ZZ. In sperm cells, the chromosome pairs split, resulting in half the number of chromosomes present in somatic cells. Therefore, a male chicken's sperm cell would have 39 chromosomes, with one being the sex chromosome (Z).

Answer 2

If a chicken skin cell in G2 has 156 chromatids, then there are 78 chromosomes in somatic cells since chromatids are doubled. During meiosis, the chromosome count is halved in gametes, so a male chicken's sperm cells would have 39 chromosomes.

Step-by-step explanation:

When observing a chicken skin cell in the G2 phase, you count 156 total chromatids. This implies that during the G2 phase, the chromosomes have already duplicated in preparation for cell division. In somatic cells, such as the skin cell of a chicken, the chromosomes are arranged in pairs, so the number of chromatids is twice the number of chromosomes. Therefore, to find the number of chromosomes, you would divide the number of chromatids by two. For a chicken skin cell with 156 chromatids, there would be 78 chromosomes.

In the gametes, or sex cells, of animals, the chromosome count is halved through the process of meiosis. This means that the male chicken's sperm cells would have half the number of chromosomes compared to the somatic cells. So, if a chicken has 78 chromosomes in its somatic cells, it would have 39 chromosomes in its sperm cells after meiosis.