Family pedigree and twin studies have been used to look for a predisposition for unipolar depression within families. Which theoretical framework encompasses these studies?

A) Humanist
B) Biological
C) Behavioral
D) Psychodynamic

Family Pedigree

A graphical representation that shows the occurrence of inheritable traits or conditions within a family across generations.

Twin Studies

Research studies that compare the similarity between monozygotic (identical) and dizygotic (fraternal) twins to understand the influence of genetics versus environment on traits and disorders.

Biological

Pertaining to the science of life or living organisms, often in the context of understanding their physiological processes.