One of the most controversial aspects of the genetic screening revolution is the proliferation of gene tests by such organizations as 23andMe and Navigenics that suggest that if you have a certain gene or cluster of genes you have a certain likelihood of contracting a specific disorder. For example, it is not uncommon to have the explanation of disease presented as “25 percent genetic and 75 percent environmental,” adding up to 100 percent of cases. However, what we have learned from gene-disease association studies is that, in reality, human disease is rarely a product of such simple and clearly defined relationships. Causation of human disease is not about nature OR nurture but more about nature AND nurture.
View the original article here: Can genes accurately predict human health?