Question

In considering the cross YyRr x YyRr, the phenotype ratios of the F2 generation will be _____.

Answer 1

The correct answer is 9: 3: 3: 1.  

Dihybrid cross refers to a cross between the two distinct genes or lines, which vary in two observed traits. In a dihybrid cross, both the parents are heterozygous, and one allele for each trait demonstrates complete dominance.  

This signifies that both the parents exhibit recessive alleles, however, also possesses the dominant phenotype. The 9:3:3:1 is the predicted phenotypic ratio in a dihybrid cross.  

Answer 2

9: 3: 3: 1 is the correct answer.

It is a dihybrid cross.

Dihybrid cross is a cross between two different lines/genes that differ in two observed traits. In the Mendelian sense, between the alleles of both these loci there is a relationship of complete dominance - recessive.