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)?

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When a testcross is performed between an organism with an unknown genotype (Aa) and a pure homozygous recessive organism (aa), the possible offspring genotypes are Aa and aa. Therefore, in this case, the offspring of an Aa genotype crossed by an aa genotype would show Aa and aa genotypes. The AA genotype is not possible in the offspring because the pure homozygous recessive organism (aa) does not have the dominant allele (A) to contribute to the offspring.

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