If A is dominant to a and B is dominant to b,what is the expected phenotypic ratio of the cross: AaBb × AaBb?

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Quizplus · Accepted Answer

Using the Punnett square method, the expected genotypic ratio of the cross is 9:3:3:1. This genotypic ratio can be translated to a phenotypic ratio of 9 individuals displaying both dominant traits (A-B-), 3 individuals displaying dominant trait A and recessive trait b (A-bb), 3 individuals displaying dominant trait B and recessive trait a (aaB-), and 1 individual displaying both recessive traits (aabb).

If a Is Dominant to a and B Is Dominant