What is Epigenetics?
Channel: Ed Drost
Date: 04/10/2023

Epigenetics is a field of biology that studies heritable changes in gene expression or cellular phenotype that occur without alterations to the underlying DNA sequence. In other words, epigenetics explores how genes can be turned on or off, or their activity levels modified, without changes to the DNA itself.

The term "epigenetics" literally means "above" or "beyond" genetics, and it refers to changes in gene function that are not caused by changes in the DNA sequence. Instead, epigenetic changes involve chemical modifications to the DNA molecule itself or to the proteins that package and interact with DNA, known as histones. These modifications can influence the accessibility of specific genes to the cellular machinery responsible for gene expression.

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