In a test cross, what percentage of the offspring will have the same phenotype as the tested parent if the parent to be tested is homozygous?

Question

Quizplus · Accepted Answer

If the parent to be tested is homozygous, then all of its gametes carry the same allele. Therefore, when the homozygous parent is crossed with a homozygous recessive individual, all of the offspring will have the same phenotype as the homozygous parent, resulting in a 100% match.

In a Test Cross, What Percentage of the Offspring Will