“…The lack of any evidence for a relationship between parental alcoholism and drinking among ALDH deficient individuals is consistent with other research suggesting that parent-offspring resemblance for drinking behavior is primarily genetically and not environmentally mediated (Cloninger, Bohman, & Sigvardsson, 1981;Goodwin, Schulsinger, Hermansen, Guze, & Winokur, 1973;McGue, Sharma, & Benson, 1996a). Our finding that sibling drinking behavior was consistently and moderately associated with adolescent drinking behavior implicates siblings as a potent but arguably underappreciated source of familial environmental effect on adolescent behavior (McGue, Sharma, & Benson, 1996b;Slomkowski, Rende, Conger, Simons, & Conger, 2001;Slomkowski, Rende, Novak, Lloyd-Richardson, & Niaura, 2005).…”