If a is dominant to a and b is dominant to b, what is the expected phenotypic ratio of the cross aabb * aabb? if a is dominant to a and b is dominant to b, what is the expected phenotypic ratio of the cross aabb * aabb? 9:3:3:1 1:1:1:1 16:0:0:0 8:4:2:2

If A is dominant to a and B is dominant to b, then a cross between AaBb x AaBb, would be give you a ratio of 9:3:3:1, this is because this is a dihybrid cross. That is both parents are heterogenous for both traits and therefore the ratio of the phenotypes will be 9:3:3; 1 ... This is an example of independent assortment