Twin studies of the heritability of schizophrenia generally show that
A) there is a 50 percent difference in the genomes between those with schizophrenia and those without it.
B) 90 percent of twins who inherit genes for schizophrenia will develop symptoms.
C) monozygotic twins tend not to inherit genes for schizophrenia.
D) the heritability of schizophrenia is about 50 percent.

Question

Quizplus · Accepted Answer

Twin studies suggest that the heritability of schizophrenia is about 50 percent, which means that 50 percent of the risk for developing schizophrenia can be attributed to genetic factors. It does not mean that an individual with a genetic predisposition will definitely develop the disorder. Monozygotic twins (who share the same genetic material) are more likely to both develop schizophrenia than dizygotic twins (who share about 50 percent of their genes).

Twin Studies of the Heritability of Schizophrenia Generally Show That