Firstly, the question is whether there is a genetic predisposition to alcohol dependence or alcohol abuse.

Adoption and twin studies have long been used to evaluate the relative importance of genetic and environmental influences on the development of alcohol dependence.

This research confirms the existence of a significant genetic influence although the majority of problem drinkers have major environmental influences on their drinking behaviour.

While considerable work is being carried out into the genetic influences on alcohol dependence, work continues into possible genetic predisposition to alcohol related brain impairment.