Research by Turkheimer and colleagues (2003) indicated that genes had a small influence on intelligence in poor environments but a large effect in high-SES environments. What does this suggest about the relative effects of nurture and nature?

Among cultures that encourage the drinking of milk, nature selects for the gene that enables members of that culture to digest lactose. Among cultures for which milk is not important, few people possess this gene. These facts support which of the following ideas about the relation between biology and culture?

Which of the following traits is likely to be the most heritable?

If the only difference between MZ and DZ twin pairs is their genetic similarity, then the difference in the degree to which the two twin types resemble each other psychologically must be caused by

Based on research by Bouchard and colleagues (1990) on the psychological similarity of twins raised apart, we would estimate that the correlation for twins raised apart on the trait of conscientiousness would be approximately

Based on twin studies, we know that the heritability of personality traits is not 1.00. This leaves room for what other kind of influences?

Heritability studies indicate that variations in genes do account, in part, for variations in personality. Which of the following would be reasonable to conclude based on this finding?

Using the metaphor of books to describe your body’s cells, what part of the book represents DNA?

In molecular genetic methods, sometimes researchers know exactly what allele they are interested in. At other times, they conduct a(n) ________ to identify the genetic basis of a behavior of interest.

Recent advances in molecular genetic analyses of monozygotic twins indicate that identical twins

The process of natural selection is incompatible with which of the following ideas?

Which of the following patterns of preferences for mates should we expect to observe, according to evolutionary psychologists?

Which of the following would not be supportive of the mental-modules hypothesis?

In an interesting illustration of culture’s influence on biology, researchers found that among people living in the Caucasus Mountains, there was little genetic diversity because of the

Although shared family environments account for none of the variability in sexual orientation, one theory is that variations in which of the following types of environment may be influential?