Before the mechanisms behind PKU were known to science, infants that inherited the genes for the disorder almost always
A) maintained a low body weight.
B) developed mental impairments.
C) grew to pass on the genes to offspring.
D) died before the age of ten.

Question

Quizplus · Accepted Answer

Before the discovery of PKU, infants with the disorder typically developed mental impairments. Without treatment, these impairments could be severe and irreversible.

Before the Mechanisms Behind PKU Were Known to Science, Infants