Y-chromosomal insights into the genetic impact of the caste system in India. by Zerjal, T, Pandya, A, Thangaraj, K, Ling, E, Kearley, J, Bertoneri, S, Paracchini, S, Singh, L, Tyler-Smith, C

“…In order to investigate the genetic consequences of this system, we have analysed male-lineage variation in a sample of 227 Indian men of known caste, 141 from the Jaunpur district of Uttar Pradesh and 86 from the rest of India. …”