Since a testcross backcrosses with a pure homozygous recessive strain,the offspring of an Aa genotype crossed by an aa genotype would show which genotype(s)?

Question

Quizplus · Accepted Answer

In a testcross, the individual with the unknown genotype (Aa) is crossed with a pure homozygous recessive individual (aa). Therefore, the possible offspring genotypes are Aa and aa, since both parents can only contribute one recessive allele each. Therefore, the answer is D, Aa and aa.

Since a Testcross Backcrosses with a Pure Homozygous Recessive Strain,the