Though there were already some sort of genetic info, regarding the difference in the North & South Indians. This info should be used exclusively for medicinal purpose, but not to differentiate again between North & South Indians. After all human beings all over the world are same. We have already facing racial attacks in Australia and this info shldn't lead to difference amongst Indians !...
Years of caste system belie Indians' shared ancestry - life - 24 September 2009 - New Scientist
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