Question

A normal number of chromosomes in all gametes is not a possible outcome as the result of meiotic non-disjunction.

If both homologs in meiosis I move to the same pole of the parent cell, all of the products of meiosis will be abnormal. If both sister chromatids in meiosis II to the same pole of the parent cell, half of the gametes will be abnormal.

Answer 1

Nondisjunction in meiosis can result in abnormal chromosome numbers in gametes. If homologous chromosomes fail to separate during meiosis I, some gametes will be missing a chromosome while others will have an extra copy. If sister chromatids fail to separate during meiosis II, one gamete will lack a chromosome, two will have the normal number, and one will have an extra copy.

Step-by-step explanation:

During meiosis, the process of cell division that produces gametes, nondisjunction can occur if homologous chromosomes fail to separate during meiosis I or if sister chromatids fail to separate during meiosis II. If nondisjunction occurs in meiosis I, the result is two gametes that lack a specific chromosome and two gametes with two copies of that chromosome. If nondisjunction occurs in meiosis II, the result is one gamete that lacks a particular chromosome, two normal gametes with one copy of the chromosome, and one gamete with two copies of the chromosome.