There Has Been a Great Deal of Research, Using a Wide

Multiple Choice

There has been a great deal of research, using a wide variety of methods, examining the concordance rates for disorders such as schizophrenia and bipolar disorder. These studies have generally revealed higher concordance rates in ______ than in __________.

A) monozygotic twins; adopted relatives
B) adopted relatives; biological relatives
C) biological relatives; adopted relatives
D) dizygotic twins; monozygotic twins
E) monozygotic twins; dizygotic twins