One of the First Medical Tests a Newborn Receives Determines

question 63

Multiple Choice

One of the first medical tests a newborn receives determines if the child has phenylketonuria (PKU) . PKU is the result of a mutation in a single gene that causes mental retardation and a host of other phenotypes (light hair and skin color, eczema, and a "mousy" smell) . By detecting PKU early, doctor are able to reduce the effect of this condition with a modified diet. PKU is an example of

• A) epistasis.
• B) a polygenic trait.
• C) pleiotrophy.
• D) codominance.

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