Question

The karyotype of one species of primate has 48 chromosomes. In a particular female, cell division malfunctions, and she produces one of her eggs with an extra chromosome (25). The most probable source of this error would be a mistake in which of the following?

Answer 1

Answer:

Either anaphase I or II.

Explanation:

Anaphase I starts at the moment in which the two chromosomes of each bivalent (tetrad) draw apart and go in different directions, specifically to the opposite poles of the cell, and this is due to the action of the spindle. In anaphase II, each chromosome's sister chromatids draw apart and also go toward the opposite poles. After this separation, the previous chromatids become known as unreplicated chromosomes.