What is Epigenetics? Epigenetics refers to mechanisms that regulate gene expression without altering the underlying DNA sequence. Epigenetic mechanisms include DNA methylation, histone modifications, and microRNAs. These epigenetic marks essentially act as labels that control which genes are turned "on" or "off" and when they are expressed. https://www.coherentmarketinsights.com/market-insight/epigenetics-drugs-and-diagnostic-technologies-market-4026