Question

Non-disjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis. As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell. This produces daughter cells with an imbalance of chromosomes. If 22 pairs of homologous chromosomes segregate normally during meiosis I in humans (n=23) but we have non-disjunction of 1 pair, then at the end of meiosis II we will have _________.

Answer 1

Answer:

24

Explanation:

Meiosis is the reduction cell division that halves the number of chromosomes resulting in haploid daughter cells. Meiosis involves two subsequent successive cell division called meiosis I and II.

Nondisjunction occurs when homologous chromosomes fail to separate during anaphase I or sister chromatids fail to segregate and go into the same gamete. The result is the addition or loss of one or more chromosome. In humans, the gamete will have have 24 chromosomes.