Keysha's mother is homozygous for a dominant allele for unattached earlobes and her father is homozygous for a recessive allele for attached earlobes. What is true about Keysha's earlobes?

Question

Quizplus · Accepted Answer

Keysha's mother's homozygous dominant genotype for unattached earlobes means she can only pass on the dominant allele for unattached earlobes. Her father's homozygous recessive genotype for attached earlobes means he can only pass on the recessive allele for attached earlobes. Therefore, Keysha must inherit one dominant allele for unattached earlobes from her mother and one recessive allele for attached earlobes from her father, making her phenotype for unattached earlobes.

Keysha's Mother Is Homozygous for a Dominant Allele for Unattached