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Studies of the relative impact of nature and nurture on human differences in aggressiveness best illustrates the research efforts of

behavior geneticist

Chromosomes are composed of

deoxyribonucleic acid

Two individuals are most likely to differ in personality if they are

fraternal twins who were raised apart

Adopted children are especially likely to have similar ________ if raised in the same home

religious beliefs

Evolutionary psychologists attribute the human tendency to fear snakes and heights to

genetic predispositions

Charles Darwin suggested that the evolution of living organisms is guided by

natural selection

Critics of evolutionary psychology are particularly likely to emphasize that gender differences in mate preferences are byproducts of

cultural practices.

The tendency to exaggerate the impact of parents' child-rearing practices on children's personality has been most characteristic of

.Freudian psychologists

Teens who smoke typically have friends who smoke. To avoid overestimating the impact of peer pressure on teens' smoking habits, it would make the most sense to consider the impact of

smoking preferences on friendship choices

By inventing customs and passing them on to their peers and offspring, chimpanzees exhibit the rudiments of


The dramatic increase in Americans' premarital sexual activity over the past half-century best illustrates that sexual behavior is influenced by


Defining one's identity in terms of one's extended family or work group is most closely associated with


A single ________ on the ________ chromosome plays a crucial role in the prenatal development of the testes

gene; Y

In the United States 30 years ago, men were expected to initiate dates and women to select wedding gifts. This best illustrates aspects of

gender roles

Because he believes that crying is a feminine trait, 14-year-old George has difficulty admitting that a movie makes him tearful. His experience best illustrates the impact of

gender schemas.

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