With independent assortment, the ratio of phenotypes in the F₂ generation of a cross between true-breeding strains (AA bb × aa BB) can be described as 9:3:3:1 when A and B are dominant over a and b. What phenotype does the "9" in the ratio refer to? A)recessive for both traits B)dominant for the A trait and recessive for the B trait C)dominant for one trait and recessive for the other D)dominant for both traits

Question

Quizplus · Accepted Answer

The "9" in the ratio refers to the phenotype that is dominant for both traits, represented by the genotype AaBb. This is because it is the only genotype that can result in both dominant traits being expressed, and it is present in 9 out of the 16 possible offspring in the F₂ generation.

With Independent Assortment, the Ratio of Phenotypes in the F2

With Independent Assortment, the Ratio of Phenotypes in the F₂