Which of the following genetic diseases 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 caused by a recessive gene that fails to produce an enzyme needed to convert an amino acid called phenylalanine into tyrosine. This results in the buildup of phenylalanine in the bloodstream and brain, which can cause intellectual disability, seizures, and other serious health problems. Tay-Sachs disease and cystic fibrosis are caused by other genetic mutations, and Turner syndrome is caused by a missing or incomplete X chromosome.

Which of the Following Genetic Diseases Results from a Recessive