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Definition of Epigenetics:
The study of heritable changes in gene function that occur without a change in the DNA sequence.
publications.nigms.nih.gov/thenewgenetics/glossary.html
the study of changes in gene silencing that occur without changes in the genes themselves. Many genes in the body are permanently turned off as ...
ccnt.hsc.usc.edu/glossary/
Epigenetics is the study of processes that establish metastable (ie, somatically heritable) states of gene expression without altering the DNA ...
www.annalsnyas.org/cgi/content/full/983/1/321