Transgenerational epigenetics

“Epigenetic inheritance is the transmittance of information from one generation to the next that affects the traits of offspring without alteration of the primary structure of DNA (i.e., the sequence of nucleotides) or from environmental cues. The term “epigenetic inheritance” is used to describe both cell–cell and organism–organism information transfer, while transgenerational epigenetics typically refers only to the latter. Although these two levels of epigenetic inheritance are equivalent in unicellular organisms, they may have distinct mechanisms and evolutionary distinctions in multicellular organisms.”
http://en.wikipedia.org/wiki/Transgenerational_epigenetics

example:

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