Question 1
Peter has Klinefelter's syndrome. He is likely to be
◦ tall, passive, and have below-normal intelligence.
◦ short and have difficulty with spatial relations.
◦ of normal height and have delayed language development.
◦ tall and of average or above average intelligence.
Question 2
Phenylketonuria (PKU) is an example of
◦ the interaction between genes and environment.
◦ a disorder caused by a dominant allele.
◦ a chromosomal abnormality caused by an extra chromosome.
◦ a disorder whose effects cannot be changed by the environment.
