Question

The phenotypic ratio in dihybrid cross is

• A. 9 : 3 : 3 : 1
• B. 9 : 2 : 2 : 1
• C. 7 : 2 : 2 : 3
• D. 5 : 3 : 3 : 2

Answer 1

The correct option is A 9 : 3 : 3 : 1

A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance. This means that both parents have recessive alleles, but exhibit the dominant phenotype. The phenotype ratio predicted for dihybrid cross is 9 : 3 : 3 : 1.