The recessive allele that causes phenylketonuria (PKU) is harmful, except when an infant's diet has appropriate levels of the amino acid phenylalanine. What maintains the presence of this harmful allele in a population's gene pool?

Question

Quizplus · Accepted Answer

Diploidy allows recessive alleles to be carried in heterozygous individuals without being expressed, maintaining them in the gene pool.

The Recessive Allele That Causes Phenylketonuria (PKU) Is Harmful, Except