Comment Re:Disease gene hunting (Score 2, Informative) 159
If you search for meta-genetics (with the hyphen) you will find a pseudo-science which really has no mainstream scientific support. How genes connect with how an organism looks, behaves etc (phenotype) is quite complicated. Gene expression is controlled by many factors and new ones are being discovered. The term I think you are looking for is epigenetic or gene imprinting. I won't get into a long explanation because you can find good information by searching. If you look up gene expression, you will also find many method of gene expression control such as siRNA or the recent discovery of miRNA, a very hot area right now.