The noticeable genetic divergence of India from other regions is coupled with low levels of genetic divergence across the subgroups within India.

(Rosenberg et al. 2006: 2053) Rosenberg, Noah A., Saurabh Mahajan, Catalina Gonzalez-Quevedo, Michael G.B. Blum, Laura Nino-Rosales, Vasiliki Ninis, Parimal Das, Madhuri Hegde, Laura Molinari, Gladys Zapata, James L. Weber, John W. Belmont & Pragna I. Patel. 2006. Low Levels of Genetic Divergence Across Geographically and Linguistically Diverse Populations from India. PLoS Genetics 2(12): e215, 2052-61.

quoted in M Danino, I.3. Genetics and the Aryan Issue in : History of ancient India editors, Dilip K. Chakrabarti and Makkhan Lal. v. 3