Assume red plumage is encoded by an autosomal dominant allele (R). You crossed a male robin...
Assume red plumage is encoded by an autosomal dominant allele (R). You crossed a male robin with a red breast and a homozygous dominant genotype with a female robin with a homozygous recessive genotype. You get both male and female offspring, but find that only the male offspring have a red breast. How could you explain this?
Group of answer choices
a The red plumage has variable expressivity in males
b The plumage gene is not present in females
c The red plumage is dominant in females, but recessive in males
d The red plumage allele has zero penetrance in females
Homework Answers
The correct answer is d The red plumage allele has zero penetrance in females. In fact, this type of genes are called sex-limited gene, where the gene is present in both sexes but is expressed only in one sex
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Assume red plumage is encoded by an autosomal dominant allele
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