William Is a Graduate Student Interested in Studying the Genetic

question 89

Multiple Choice

William is a graduate student interested in studying the genetic influences on sexual orientation. One of the first things that William learns is that

• A) the Y sex chromosome inherited from the father seems to be related to men being gay.
• B) identical twins are more likely to have the same sexual orientation than non-identical twins.
• C) researchers have found clear evidence of a "gay gene" that is associated with homosexuality.
• D) hormones are not known to have any influence on sexual orientation.

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