In purple people eaters, purple is dominant to white.A true-breeding white mutant is mated with a different true-breeding white mutant.All of the F₁ are purple.When the purple F₁ offspring mate with each other, their offspring occur in the ratio of 9 purple:7 white.Which phenomenon explains the purple F₁ offspring?

Question

Quizplus · Accepted Answer

Complementation explains the purple F₁ offspring because two different true-breeding white mutants produced purple offspring, indicating that each parent carried a different recessive mutation that, when combined in their offspring, complemented each other to produce the dominant purple phenotype.

In Purple People Eaters, Purple Is Dominant to White