[Source: https://www.youtube.com/watch?v=BD6h-wDj7bw&feature=youtu.be&noredirect=1]
Epigenetics
From Wikipedia, the free encyclopedia
For the unfolding of an organism or the theory that plants and animals (including humans) develop in this way, see epigenesis (biology). For epigenetics in robotics, see developmental robotics.
In biology, and specifically genetics, epigenetics is the study of heritable changes in gene activity that are not caused by changes in the DNA
sequence; it also can be used to describe the study of stable,
long-term alterations in the transcriptional potential of a cell that
are not necessarily heritable. Unlike simple genetics based on changes to the DNA sequence (the genotype), the changes in gene expression or cellular phenotype of epigenetics have other causes, thus use of the term epi- (Greek: επί- over, outside of, around) -genetics.[1] [Source:http://en.wikipedia.org/wiki/Epigenetics]