What did the results suggest about sexual behaviors in the world's largest study of twins in 2008?
a. Sexual behavior is shaped only by genetics.
b. Sexual behavior is shaped only by environmental factors.
c. Sexual behavior is shaped by both genetics and environmental factors.
d. Sexual behaviors are a choice than can be changed at will.
C Correct Answer: Sexual behavior is shaped by both genetics and environmental factors.
Feedback for Correct Answer: In 2008, the world's largest study of twins affirmed what a number of studies have suggested, that "homosexual behavior is largely shaped by genetics and random environmental factors." The researchers noted that heterosexual behavior is also influenced by this same mix of environmental factors and genetics (Schlatter and Steinback, 2010, p. 32).
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