phenylketonuria (pku) is a disease in humans that results from the abnormal metabolism of the amino acid phenylalanine. if untreated, it can lead to severe brain damage in infants. two normal parents have a child who has pku. what can you determine about the inheritance of the pku allele from this information? group of answer choices it is epistatic. it is dominant. it is pleiotropic. it is recessive.

Phenylketonuria (fen-ul-key-toe-NU-ree-uh), also called PKU, is a rare inherited disease that causes an amino acid called phenylalanine to build up in the body. PKU is due to a switch within the phenylalanine hydroxylase (PAH) gene. This gene facilitates the creation of the enzyme necessary to break down phenylalanine.

PKU is due to mutations within the gene that facilitates the production of an enzyme called phenylalanine hydroxylase (called phen-l-AL-uh-neen hazy-DROK-such-leys), or PAH. This enzyme is sought after to convert the amino acid phenylalanine into different substances that the body wants. Meals that contain large amounts of food should be eliminated from a low eating plan. these meals are protein-rich ingredients such as milk, dairy, meat, fish, poultry, eggs, beans, and nuts. those foods cause high blood levels for humans with PKU.

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