Dihybrid crosses can be conducted with two organisms that are heterozygous for two different traits: SsYy x SsYy for example. Which genotypic ratio shows that genes in dihybrid crosses are inherited according to the principle of independent assortment?

Question

Dihybrid crosses can be conducted with two organisms that are heterozygous for two different traits: SsYy x SsYy for example. Which genotypic ratio shows that genes in dihybrid crosses are inherited according to the principle of independent assortment?

A.
25:25:25:25

B.
50:50

C.
3:1

D.
9:3:3:1

Answer 1

D.

9:3:3:1

This genotypic ratio shows that genes in dihybrid crosses are inherited according to the principle of independent assortment, where different genes segregate independently of each other during gamete formation.