A PTA works in a pediatric clinic with a patient who was bor…
A PTA works in a pediatric clinic with a patient who was born with a deficiency of the liver enzyme phenylalanine hydroxylase. The patient exhibits evidence of the following: mental retardation, microcephaly, delayed speech, and neurological impairment. The PTA correctly assumes that this patient likely suffers from which of the following autosomal recessive disorders?
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