What conclusion is consistent with the results of twin studies of schizophrenia?
A) Though monozygotic twins are more concordant for schizophrenia than dizygotic twins, genes account for only about 10 percent of the differences.
B) Differences in dizygotic genes account for about 90 percent of the instances of schizophrenia among family members.
C) Differences in genes account for about 50 percent of the differences between people, in cases of schizophrenia.
D) Differences in genes account for about 27 percent of the differences between people, in cases of schizophrenia.

Question

Quizplus · Accepted Answer

Twin studies of schizophrenia have shown that genetics play a significant role in the disorder, with estimates suggesting that about 50% of the variance in susceptibility to schizophrenia can be attributed to genetic differences. Monozygotic (identical) twins have a higher concordance rate for schizophrenia than dizygotic (fraternal) twins, supporting the genetic component.

What Conclusion Is Consistent with the Results of Twin Studies