Psychology / Unit 2 Psych 0259 short lesson, about 20 seconds
Epigenetics
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The idea
Epigenetics studies changes in gene expression caused by environmental factors, without changes to the DNA sequence.
In practice
Early-life stress alters the expression of stress-response genes that remain structurally unchanged.
Where people slip
Epigenetics does not mean acquired traits are inherited generally. Which effects carry forward remains under study.
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