Any process that modulates the frequency, rate or extent of gene expression; the process is mitotically or meiotically heritable, or is stably self-propagated in the cytoplasm of a resting cell, and does not entail a change in DNA sequence.

http://purl.obolibrary.org/obo/GO_0040029

Any process that modulates the frequency, rate or extent of gene expression; the process is mitotically or meiotically heritable, or is stably self-propagated in the cytoplasm of a resting cell, and does not entail a change in DNA sequence.

epigenetic regulation of gene expression

GO:0040029

epigenetic regulation of gene expression

http://purl.obolibrary.org/obo/GO_0010468