Epigenetics explains how nongenetic forces can alter generational phenotypes in a heritable manner.1 Certain addictions are not 100% heritable yet are still completely genetic in causation. An epigenetic effect via environmental exposure could play a role in addiction and should certainly be studied by behavioral geneticists. It's a valid alternative to psychobabble or conscious, willful decisions made by the addicts.

Dan F. Umanoff

President and Founder, The National Association for the Advancement and Advocacy of Addicts (N4A) www.hypoism.com umanoff@adelphia.net

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