Question

in the image below, what is the value of n in the cell on the left? process: nondisjunction first meiotic division second meiotic division homologs fail to separate 2n = 4 1. meiosis i starts normally. bivalents line up in middle of cell. 2. nondisjunction occurs with one set of homologs. 3. sister chromatids separate normally in meiosis ii. 4. aneuploidy results. all gametes have too many or too few chromosomes. figure 13.13 nondisjunction leads to gametes with abnormal chromosome numbers. if homologous chromosomes fail to separate during meiosis i, the gametes that result will have an extra chromosome or will lack a chromosome. nondisjunction can also occur during meiosis ii if sister chromatids fail to separate. copyright © 2019 pearson canada inc. select one: a. 2 b. 4 c. 1 d. 8 clear my choice

Explanation:

The leftmost cell shows a diploid cell with \(2n = 4\). By definition, \(n\) represents the haploid number, so solving \(2n = 4\) gives \(n = 2\).

Answer:

a. 2