epigenetics /ˌɛpɪd͡ʒəˈnɛtɪks/ noun2 •The study of the processes involved in the genetic development of an organism, especially the activation and deactivation of genes.Epigenetics deals with the regulation of genetic activity within a cell - which genes are switched on or off, and when it happens. — 2010 •The study of heritable changes caused by the activation and deactivation of genes without any change in DNA sequence.
