Recessive alleles that are not visible in a parent's phenotype can be present in their genotype and are more likely to be expressed in their child's _____.
A) phenotype if either parent contributes a dominant allele for that trait.
B) genotype if both parents contribute recessive alleles for that trait.
C) phenotype if both parents contribute recessive alleles for that trait.
D) genotype if both parents contribute dominant alleles for that trait.

Question

Quizplus · Accepted Answer

Recessive alleles are only expressed in an individual's phenotype if they are present in both copies of their genotype. Therefore, if both parents contribute recessive alleles for a given trait, their child will inherit two copies of the recessive allele and exhibit the corresponding phenotype. If either parent contributes a dominant allele, the dominant allele will mask the recessive allele and the child will not exhibit the recessive phenotype. If both parents contribute dominant alleles, the child will inherit at least one dominant allele and may or may not exhibit the corresponding phenotype, depending on whether they also inherit a recessive allele from one or both parents.

Recessive Alleles That Are Not Visible in a Parent's Phenotype