PKU is transmitted by a
A) recessive gene mutation.
B) pair of dominant genes.
C) dominant gene mutation.
D) triad of recessive genes.
E) single extra chromosome 23.

Question

Quizplus · Accepted Answer

PKU (phenylketonuria) is caused by a recessive gene mutation, meaning that an affected individual must inherit two copies of the mutated gene (one from each parent) in order to develop the disorder. If an individual inherits only one mutated gene, they are considered carriers but do not have PKU themselves.

PKU Is Transmitted by a