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

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.