The presence of a recessive allele:
A) can always be determined from the phenotype.
B) is usually masked in the phenotype.
C) is expressed in the phenotype alongside a dominant allele.
D) can never be expressed in the phenotype.

Question

Quizplus · Accepted Answer

A recessive allele is only expressed in the phenotype if the individual is homozygous recessive, meaning they inherited two copies of the recessive allele. If they inherit one copy of the recessive allele and one copy of a dominant allele, the dominant allele will mask the expression of the recessive allele in the phenotype. Therefore, the presence of a recessive allele is usually masked in the phenotype.

The Presence of a Recessive Allele