Nondisjunction of chromosomes resulting in aneuploidy occurs during:
A)anaphase of mitosis
B)prophase I
C)metaphase II
D)anaphase I or II
E)telophase I

Question

Quizplus · Accepted Answer

Nondisjunction occurs when homologous chromosomes fail to separate during meiosis I (anaphase I) or sister chromatids fail to separate during meiosis II (anaphase II). This results in gametes with an abnormal number of chromosomes, known as aneuploidy.

Nondisjunction of Chromosomes Resulting in Aneuploidy Occurs During