All of the following statements about the genetic basis of schizophrenia are trueEXCEPT that |
A | ) | adoption studies indicate a biological basis for schizophrenia. | |
B | ) | the concordance rate for schizophrenia is higher for monozygotic than for dizygotic twins. | |
C | ) | a person with a “schizophrenia gene” will always develop schizophrenia. | |
D | ) | several genes may be involved in schizophrenia. | |
E | ) | genes impart a susceptibility to develop schizophrenia. |