A heterozygous individual who exhibits no signs of this disease still scores substantially higher than a normal person on a plasma tolerance test.  Mothers who are heterozygous carriers of the disease are at risk for serious pregnancy complications. Clinical signs include eczema and decreased pigment in skin and hair.  Its classical form is an autosomal recessive disorder of a locus on chromosome 12.  Normally the body would produce the amino acid tyrosine, but due to a deficiency of a hydroxylase, another amino acid can build up to toxic levels.  FTP, name this disease that can cause mental retardation following consumption of a certain amino acid, and whose name derives from the musty odor of the patient's urine.
A heterozygous individual who exhibits no signs of this disease still scores substantially higher than a normal person on a plasma tolerance test.  Mothers who are heterozygous carriers of the disease are at risk for serious pregnancy complications. Clinical signs include eczema and decreased pigment in skin and hair.  Its classical form is an autosomal recessive disorder of a locus on chromosome 12.  Normally the body would produce the amino acid tyrosine, but due to a deficiency of a hydroxylase, another amino acid can build up to toxic levels.  FTP, name this disease that can cause mental retardation following consumption of a certain amino acid, and whose name derives from the musty odor of the patient's urine.
A heterozygous individual who exhibits no signs of this disease still scores substantially higher than a normal person on a plasma tolerance test.  
phenylketonuria or PKU or Folling's Disease