By comparing human data with genetic data from chimpanzees, the team were able to conclude that the genetic variant was the result of a selection event favouring variants that increase the risk of heart disease, coeliac disease and type 1 diabetes in European populations 3,400 years ago. The authors suggest that the risk factors were positively selected for because they gave carriers an increased protection against infection.
Saturday, October 17, 2009
Certain genetic risk factors are uniquely found in individuals of European origin
Scientists have found evidence of recent natural selection in Europeans: