The fact that a person with phenylketonuria can essentially mute the effects of their disease by controlling their dietary intake of a specific amino acid is an example of which of the following principles?
a. Heredity and the environment interact dynamically throughout development.
b. Genes can influence the environment to which a person is exposed.
c. Development is multidirectional in its nature.
d. Environmental influences typically make children within a family different.
Question 2
Which of the following is TRUE about siblings?
a. Their interactions are mostly negative.
b. Their interactions are usually unemotional.
c. There are no consistent findings in sibling relationships.
d. There are both positive and negative aspects to sibling relationships.
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