Question

chromosomal inheritance: nondisjunction in meiosis i, number of affected daughter cells
if nondisjunction occurs during meiosis i, how many of the daughter cells will have an incorrect number of chromosomes?
multiple choice
3
1
2
4

Explanation:

During meiosis I, homologous chromosomes fail to separate (nondisjunction). This leads to both daughter cells from meiosis I having an abnormal chromosome number. Then, when these cells undergo meiosis II (normal separation of sister chromatids), all 4 daughter cells (resulting from the two abnormal cells from meiosis I each dividing in meiosis II) will have an incorrect number of chromosomes.

Answer:

4