Which of the following do phenylketonuria and Tay-Sachs disease have in common?

A) Both can be detected at birth and treated.
B) Both are caused by a double recessive gene.
C) Both are metabolic defects involving an amino acid.
D) People of Eastern European Jewish ancestry are at increased risk for both.

Answer: B) Both are caused by a double recessive gene.

Psychology

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Which of the following tastes causes babies to spit?

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