Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Epigenetic changes refer to modifications in gene expression caused by mechanisms other than changes in the underlying DNA sequence. These can include things like methylation or histone modification.
Related terms
Histone Modification: The addition or removal of chemical groups on histone proteins around which DNA is wound, affecting gene expression.
DNA Methylation: The addition of a methyl group to the DNA molecule, often reducing gene expression.
Non-coding RNA molecules (ncRNAs): RNA molecules that do not code for proteins but can regulate gene expression.