When Wendy was a baby,she was diagnosed with a gene-linked abnormality that left her unable to metabolize an important amino acid.Because her condition was diagnosed early,the doctors recommended that her parents put her on a diet that prevents an excess accumulation of the concerning amino acid in her body.This diet has helped her deal with the disorder successfully without experiencing any of the major disturbances of development this disorder is associated with.Wendy is likely suffering from
A)phenylketonuria.
B)hemophilia.
C)Turner syndrome.
D)fragile X syndrome.

Question

Quizplus · Accepted Answer

The inability to metabolize an important amino acid is a characteristic of phenylketonuria (PKU). PKU is caused by a genetic mutation that leads to a deficiency in the enzyme phenylalanine hydroxylase, which normally converts the amino acid phenylalanine into another amino acid called tyrosine. Without this enzyme, phenylalanine and other byproducts can accumulate in the body and cause brain damage and other developmental problems. Treatment for PKU includes a low-phenylalanine diet, which can help prevent symptoms and allow for normal development.

When Wendy Was a Baby,she Was Diagnosed with a Gene-Linked