Each person has either the long or short allele related to serotonin function,which interacts with life stress to produce different levels of activity in the amygdala and hippocampus.Variations in amygdala and hippocampus activity are associated with depression.This is an example of ________.

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This is an example of epigenetics, as the interaction between genes and the environment (life stress) can produce changes in the expression of genes related to serotonin function, which in turn affects the activity of brain regions associated with depression.

Each Person Has Either the Long or Short Allele Related