gen-state-epigenetics-precisely-and-explain-why-it-matters-in-2-b613

State epigenetics precisely and explain why it matters in 2-3 sentences.

# Epigenetics Definition **Epigenetics** is the study of heritable changes in gene expression that occur without alterations to the underlying DNA sequence, primarily through chemical modifications like DNA methylation and histone modification. ## Why It Matters Epigenetics explains how identical genetic code can produce different outcomes—why identical twins aren't truly identical, how environmental factors (diet, stress, toxins) can influence health across generations, and why cells with the same DNA become different tissue types. This has revolutionized our understanding of disease, particularly cancer, and opened new therapeutic possibilities since epigenetic changes, unlike genetic mutations, are potentially reversible.