A genetic explanation of schizophrenia would be supported by which of the following choices?
A)Higher concordance between MZ than DZ twins.
B)MZ twins reared apart are likely to share the disorder.
C)First-degree relatives of someone with schizophrenia are more likely to have schizophrenia than third-degree relatives.
D)All of these support a genetic explanation.

Question

Quizplus · Accepted Answer

All of these options support a genetic explanation for schizophrenia. Option A suggests a strong genetic influence as MZ twins (who share more genetic material) have higher concordance rates than DZ twins (who share less genetic material). Option B also supports a genetic influence as MZ twins reared apart (who also share less environmental influences) still show a high concordance rate for schizophrenia. Option C supports the idea that there is a genetic component to schizophrenia, as first-degree relatives (who share more genetic material) are more likely to have the disorder than more distant relatives.

A Genetic Explanation of Schizophrenia Would Be Supported by Which