Results of gamete formation

Results of gamete formation when two heterozygous genes are (a) on two different pairs of chromosomes; (b) on the same pair of homologs, but with no exchange occurring between them; and (c) on the same pair of homologs, but with an exchange occurring between two nonsister chromatids.

(a) Independem assortmemfiWo genes on two different homologous pairs of chromosomes ([1) Linkage: Two genes on a single pair of homologs: no exchange occurs 3% 33 l—fi mm >1: DU- mu: A B as Gameles a b m A 3 =3— 3 b m (c) Linkage:Two genes on a single pair of homologs; exchange occurs between two nonsister chromatids A B . A B Nonslster a b chromalids a b B A b __.. _ . Crossover gamete Gametes Crossover gamete gamete