Ans: D. A genetic vulnerability to schizophrenia has been demonstrated by both MZ and DZ twin studies.
Which of the following MOST accurately describes results from twin studies in the causes of schizophrenic disorders?
A. The concordance rates are higher for fraternal twins than for monozygotic twins, according to twin and adoption studies.
B. Twin studies have consistently found that fraternal twins and identical twins share similar concordance rates for the development of schizophrenia.
C. Most recent research from twin studies have been inconclusive as to the role genetics play.
D. A genetic vulnerability to schizophrenia has been demonstrated by both MZ and DZ twin studies.
Psychology
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