Wikimedia Commons has media related to Epigenetics.
Epigenetics has two closely related meanings:
The study of the processes involved in the unfolding development of an organism. This includes phenomena such as
X chromosome inactivation in mammalian females, and
gene silencing within an organism.
The study of heritable changes in
gene function that occur without a change in the sequence of
nuclearDNA. This includes the study of how environmental factors affecting a parent can result in changes in the way genes are expressed in the offspring.