Monozygotic twins allow for unique genetic studies because they
a. have identical genes.
b. always share the same environment.
c. share approximately 50 percent of the same genes.
d. are usually raised in similar ways.
Question 2Adoption studies are often used when attempting to study the influence of genetic factors on psychological disorders because these studies allow examination of genetic influences of psychopathology
a. without the typical confound of common biological parents.
b. using more sophisticated statistical techniques.
c. through direct examination of genetic causes.
d. without the typical confound of siblings raised in the same environment.
Question 3One of the major problems of using family studies to determine the genetic components of psychological disorders is that family members may have similar disorders due to
a. shared genes.
b. common diet factors.
c. physical similarities.
d. the fact that they live together.
Question 4Family studies are often used to help determine whether a psychological disorder has a genetic component. Which of the following patterns is typical for a disorder that is influenced by genetics?
a. Siblings of the person with the disorder are more likely to have the disorder than cousins, and cousins are just as likely to have the disorder as the general public.
b. Siblings of the person with the disorder will almost always have the same or similar disorders, and cousins are more likely than the general public to have disorders.
c. Siblings of the person with the disorder are more likely than cousins to have the disorder, and cousins are more likely to have the disorder than the general public.
d. Siblings will almost always have the same or similar disorders, though cousins may have a similar rate of the disorder as the general public.
Question 5One reason that we can expect rapid increases in our understanding of the genetic influences of psychopathology over the next several years is the
a. success of the human genome project.
b. development of powerful new statistical techniques.
c. recent availability of fast, new-generation computers.
d. availability of new brain-scanning technology.
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