A eukaryotic diploid cell from an organism with the XX-XO sex determination system has two pairs of autosomes and one X chromosome, shown below. A diploid cell from this individual begins to go through meiosis.After the completion of meiosis I, it becomes two cells.One of these two cells now undergoes meiosis II.Which of the following is a possible normal combination of chromosomes in one of the subsequent two cells after the completion of meiosis II?

Question

A eukaryotic diploid cell from an organism with the XX-XO sex determination system has two pairs of autosomes and one X chromosome, shown below.  A diploid cell from this individual begins to go through meiosis.After the completion of meiosis I, it becomes two cells.One of these two cells now undergoes meiosis II.Which of the following is a possible normal combination of chromosomes in one of the subsequent two cells after the completion of meiosis II?

Quizplus · Accepted Answer

In the first meiotic division, the X chromosome pairs separate, resulting in two cells with one X chromosome each. The XX cell does not divide further. The other cell has only one chromosome from each autosome pair and one X chromosome. This cell proceeds to the second meiotic division, resulting in two cells with one chromosome from each autosome pair and one X chromosome each.

Therefore, in the two resultant cells, one cell can have one chromosome with the A allele and one with the B allele, while the other cell can have one chromosome with the a allele, one with the B allele, and one X chromosome. Both combinations are possible. Hence, option E is correct.

A Eukaryotic Diploid Cell from an Organism with the XX-XO