Which genetic disease results from a recessive gene that fails to produce an enzyme needed to convert an amino acid into tyrosine?

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Phenylketonuria (PKU) is a genetic disease that results from a recessive gene that fails to produce an enzyme needed to convert an amino acid called phenylalanine into tyrosine. As a result, phenylalanine and its byproducts accumulate in the blood and brain, leading to intellectual disability, seizures, and other neurological problems if left untreated. Tay-Sachs disease and cystic fibrosis are caused by different genetic mutations, while Turner syndrome is a chromosomal disorder that affects females.

Which Genetic Disease Results from a Recessive Gene That Fails