In which of the following situations would the risk of developing schizophrenia be the lowest for a child?
a. A child's schizophrenic parent has a non-schizophrenic identical twin.
b. A child's non-schizophrenic parent has a schizophrenic identical twin.
c. A child's schizophrenic parent has a non-schizophrenic fraternal twin.
d. A child's non-schizophrenic parent has a schizophrenic fraternal twin.
Question 2
Given the research on schizophrenia involving the offspring of twins, all of the following are accurate statements EXCEPT that
a. the child of a schizophrenic identical twin has the same risk (17 percent) of having the disorder as the child of the non-schizophrenic identical twin.
b. the child of a non-schizophrenic fraternal twin has about a 2 percent risk of having the disorder.
c. a mentally healthy individual with a schizophrenic parent cannot pass on a genetic predisposition for the disorder to his or her offspring.
d. an individual can be free from schizophrenia but still be a carrier..
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