Most Hospitals Routinely Test All Newborns for an Autosomal Recessive

Multiple Choice

Most hospitals routinely test all newborns for an autosomal recessive disorder in which an enzyme in amino acid metabolism is NOT produced. In this disorder, lack of the enzyme leads to a buildup of compounds that damage brain tissue, possibly leading to mental retardation, unless a restricted diet is followed. What is the name of this disorder?

A) Duchenne muscular dystrophy
B) achondroplasia
C) sickle cell anemia
D) phenylketonuria