If cell X enters meiosis, and nondisjunction of one chromosome occurs in one of its daughter cells during meiosis II, how will this affect the gametes at the completion of meiosis?
A) All the gametes descended from cell X will be diploid.
B) Half of the gametes descended from cell X will be n + 1, and half will be n - 1.
C) One-quarter of the gametes descended from cell X will be n + 1, one-quarter will be n - 1, and half will be n.
D) Two of the four gametes descended from cell X will be haploid, and two will be diploid.

Question

Quizplus · Accepted Answer

Nondisjunction during meiosis II would result in one daughter cell having an extra chromosome (n + 1) and another daughter cell having one less chromosome (n - 1). This means that one-quarter of the gametes descended from cell X will have an extra chromosome (n + 1), one-quarter will be missing a chromosome (n - 1), and half will be normal (n).

If Cell X Enters Meiosis, and Nondisjunction of One Chromosome