Finally, addiction research studies have determined that alcohol use disorders are generally not an isolated event in a family line and can occur across generations. However, the line between what can be considered genetic and what is environmental can seem a bit blurred, as we have already illustrated that children raised by people with alcohol use disorders are likely to develop them as well.On the other hand, while scientists have yet to identify anything as specific as a gene that indicates susceptibility to alcohol abuse, what we do know is that there are some genetic variations in people that can contribute to raising their risk of alcoholism. There are certain genes that cause a boost in the intoxicating effects of alcohol in people as compared to people who do not have the gene. Similarly, there are genetic mutations that reduce the effects of a hangover. For someone with both of these genetic variations who experiences more intense effects when they drink with less of a hangover, this can easily lead to them being more likely to misuse or abuse alcohol.