Economist has this politically incorrect article on the influence of certain type of genes like Tay-Sachs on intelligence and disease. Gregory Cochran has results in which he found out that Ashkenazi Jews scored atleast a minmum of 15-20% higher in IQ tests than any other major racial group. (Were Indians too considered? I dont know). He's also found a correlation between this intelligence and some disease.
The results of this study could be revolutionary!! You are then scientifically (but may not be legally) allowed to have prejudices on basis of race and color. So can I trade in some intelligence for a disease? Many of us might want to be Einstein for a day and create some amazing science and history.