Author Question: A strong piece of evidence that genes alone do not cause the vast majority of mental disorders is ... (Read 36 times)

yoroshambo · **on:** Jun 22, 2018

A strong piece of evidence that genes alone do not cause the vast majority of mental disorders is that genetic studies

a. rely too much on twin studies and not enough on adoption studies.
b. rely too much on adoption studies and not enough on twin studies.
c. typically find concordance rates for DZ twins far below 100 percent.
d. typically find concordance rates for MZ twins far below 100 percent.

Question 2

Adoption studies are important in behavior genetics because they help to

a. investigate the effects of adoption.
b. provide evidence on genetic versus environmental contributions.
c. separate the MZ twins from the DZ twins.
d. determine whether adoption can influence genetic makeup.