Biology, 18.12.2019 18:31 BaileyElizabethRay

With independent assortment, the ratio of phenotypes in the f2 generation of a cross between true-breeding strains (aa bb x aa bb) can be described as 9: 3: 3: 1 when a and b are dominant over a and b. to what phenotype does the "9" in the ratio refer?

a. recessive for both traits
b. dominant for one trait and recessive for the other
c. dominant for the a trait and recessive for the b trait
d. dominant for both traits

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