Answer to Question 1
C
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Tay-Sachs disease is an inborn error of metabolism, primarily affecting children of Ashkenazi Jewish descent. Symptoms begin at about 1 year of age. The child becomes hypotonic and loses vision. Death usually occurs before 4 years of age. Fragile X syndrome is a genetic, sex-linked abnormality of the X chromosome that results in cognitive impairment and distinctive physical features. Hemophilia is a blood clotting disorder, and Duchenne muscular dystrophy is the most common degenerative muscular disorder in children.
Answer to Question 2
B