________ studies allow researchers to search for associations between specific genetic abnormalities and psychopathology.

A) Adoption
B) Molecular genetic
C) Twin
D) Family history

Molecular genetic studies focus specifically on searching for genetic abnormalities associated with psychopathology. Adoption studies look at the impact of environment and genetics by comparing adopted children to their biological and adoptive families. Twin studies compare the concordance rates of mental disorders between monozygotic (identical) and dizygotic (fraternal) twins to determine the role of genetics in mental illness. Family history studies look at the prevalence of a certain disorder within a family to determine if there is a genetic component.