Petunia is 54; her daughter Daisy is 32; and her granddaughter Rose is 4 . For which of these individuals is intelligence most heavily influenced by environmental factors?
a. Petunia
b. Daisy
c. Rose
d. The intelligence of all three is equally influenced by environmental factors.
Question 2Which of the following statements is NOT accurate based on behavior genetics studies of intelligence?
a. In general, the more closely related two biological relatives, the more similar their levels of intelligence.
b. In general, the intelligence of biological relatives reared together is more similar than the intelligence of biological relatives reared apart.
c. In general, the intelligence of nonbiological relatives reared together is more similar than the intelligence of nonbiological relatives reared apart.
d. In general, identical twins reared together are perfectly concordant for intelligence.
Question 3Recent estimates of the percentage of IQ variance associated with genetic factors range from approximately __________.
a. 10-30
b. 0-5
c. 50-80
d. 85-100
Question 4ALL BUT WHICH of the following circumstances would suggest a significant genetic influence in the appearance of a characteristic like intelligence?
a. A twin study finds higher concordance rates for MZ twin pairs than for DZ twin pairs.
b. A twin study finds similar concordance rates for MZ twins reared together and MZ twins reared apart.
c. A twin study finds similar concordance rates for DZ twins reared together and DZ twins reared apart.
d. All of the above suggest a significant genetic influence.
Question 5Which of the following statements is true?
a. Hispanic Americans tend to obtain significantly lower IQ scores than White Americans.
b. African Americans tend to obtain significantly lower IQ scores than White Americans.
c. After puberty, males tend to score significantly higher than women on tests of quantitative ability.
d. all of the above
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