environment determines how genetics manifest themselves. genetics is the medical professions excuse for when they are ineffectual. the constant environment and thought life are what create the health picture. genetics might determine you get cancer in your liver instead of lungs. the cancer is enviornmental for both. dont buy this genetic angle. they love it because they can tell you all day about it and you can never check it out for yourself. why they like drugs, too. they change the chemistry of the entire body at the drop of a hat but never lay claim to subsequent health problems unless they are immedite or described in the literature. everything else is your problem, not theirs.