Read each question carefully and fill in the blank with the correct answer from the drop-down menu. Some answers may be used more than once, and others may not be used at all. In a cross where the parental genotype is AA
\times
aa, what proportion of homozygotes is expected among the F2 offspring?
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In a cross where the parental genotype is
AAbb\times
aa
BB
, what proportion of the
F2
offspring is expected to be homozygous for at least one gene?
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In the testcross
AaBb\times
aa bb , what proportion of individuals are expected to be homozygous for both genes in the F1 generation?
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Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a homozygous black guinea pig with a heterozygous brown guinea pig, what proportion of the progeny will be black?
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