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

choose the correct answer

Answer 1

D. 9:3:3:1

This genotypic ratio of 9:3:3:1 in a dihybrid cross demonstrates independent assortment, as it shows the possible combinations of genotypes resulting from the alleles for two different traits segregating independently of each other during gamete formation.