Jeff is conducting a literature review on the research on genetics and sexual orientation. He would find which of the following statements are supported by research?
a. Most influential genetic studies of sexual orientation involve pairs of non-identical twins.
b. Only 4 to 5 of the variation in sexual orientation can be explained by genetic influences.
c. Over the past 30 years, research methods have become more sophisticated, allowing researchers to tease apart the forces of environment and genes.
d. Scientists have uncovered a gay gene that causes sexual orientation.
Question 2
Irene is investigating daughters whose mothers were given the drug diethylstilbestrol (DES) while pregnant. Based on the previous research, which of the following findings is she most likely to learn?
a. DES prevented miscarriage in both the mothers and their daughters.
b. Daughter exposed to DES in the womb were more likely to be heterosexual as adults.
c. Daughters exposed to DES in the womb are significantly more likely to be gay or bisexual as adults.
d. DES led to a decreased risk of cancer for both the mothers and their daughters.
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RESEARCH TECHNIQUE
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