A genetic predisposition to develop a drinking problem when exposed to beer is not, however, that reason.
However, with the exception of the large effects contributed by variation at ADH1B and ALDH2 in Asian populations (Edenberg 2007; Hurley and Edenberg 2012), there is little consistency across studies. Nevertheless, one gene encoding cadherin 13 (CDH13) was replicated in four independent studies among all SNPs that were significant at a nominal P value (Johnson et al. 2006; Liu et al. 2006b; Treutlein et al. 2009; Lind et al. 2010).
If you’re going to make a clone army, you might want to avoid the CDH13 rs11640875 A alleles. Also keep in mind that there are some 100 different types of cadherin molecules expressed in the brain and they mediate all manner of cell-to-cell contact and signalling processes. Not surprisingly, this class of cell adhesion molecules are widely associated with mental disorders.