From one generation to the next epigenetically in mice:-http://www.the-scientist.com/?articles.view/articleNo/41239/title/Epigenetics-Paper-Raises-Questions/- "commentary published in GENETICS this week (October 15) questions the results of a December 2013 Nature Neuroscience paper about how mice, when conditioned to fear odors, pass on their fears to their pups, as well as to their pups' offspring, presumably by an epigenetic mechanism."