Question

Which of the following is an example of genetic contributions to depression?

a. Nearly 90% of depressed teenagers also have depressed siblings.

b. Depressed individuals often have disruptions in the overall balance and production of neurotransmitters.

c. There are unique alleles that trigger depression despite environmental circumstances.

d. Virtually all depressed adolescents have significant abnormalities in brain structures and functions.

Answer 1

The example that represents genetic contributions to depression is the presence of unique alleles that predispose individuals to depression, regardless of environmental factors.

Step-by-step explanation:

The example of genetic contributions to depression is c. There are unique alleles that trigger depression despite environmental circumstances. This option directly refers to the genetic underpinnings of the disorder, indicating that certain genes or variations of genes (alleles) are associated with an increased risk of depression.

Studies in genetics have shown that various behavioral and psychological traits, including mental health disorders like depression, can have genetic links.

Genetic architectures of psychiatric disorders show that while environmental factors do play a significant role, the presence of specific alleles can predispose individuals to depression, even when environmental variables are controlled for.