link between drinking and dna. some say if we can find a dna profile for alcoholics, a so-called alcoholism gene we may be able to solve drinking problems with a simple prescription. let's ask dr. marc siegl if this is indeed true. he's a member of the fox news medical a team. is being an alcoholic genetic. >> i think it's true but i don't think it's simple. i think there are many genes involved. let's define an alcoholic. we're talking about someone where alcohol takes over their lives, for some reason it's an increasing amount of alcohol, you can't control it, it impedes on your social function. one in ten americans have that problem. what is shocking about this study going on in indiana university they found that if you're a child born of a parent who is an alcohol you have a four times greater chance of being an alcoholic yourself even if you don't live with them. jenna: even if there is no alcohol in the household or you are not living with them.