Goodbye GATTACA: Environment and lifestyle affect which genes are actually expressed
The genes that matter are the ones that are expressed. A recent North Caroline State University study of North African Berbers showed that which breathing-related genes were expressed depended in large part on whether the individual is living an urban, rural, or nomadic lifestyle.
Vince Freeman, the genetically troubled hero of GATTACA (1997), need not rely only on determination. He has other heavy hitters on his team too, as it turns out. Genes "R" Not Us.
Go here for more.