Which of the Following Statements Is FALSE Regarding Phenylketonuria (PKU)

Which of the following statements is FALSE regarding phenylketonuria (PKU) ?

A) It is caused by the interaction of a number of different genes.
B) It arises only in certain intrauterine environments, indicating the importance of gene-environment interactions in determining an individual's phenotype.
C) It can be controlled through appropriate diet, indicating that what is genetic is not necessarily fixed and unchangeable.
D) Its heritabilitity is currently quite low.

Correct Answer:

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