CASTE SYSTEM IS IN THE BLOOD
The results reveal that the rules of caste were far more rigidly enforced for men than for women. While it was always possible for a woman to advance by marrying a man in a higher caste, this was not possible for men. As a result, the mitochondrial DNA shows slight blurring of the caste lines, while the Y chromosome DNA segregates clearly into different castes.
team also found that higher castes resemble Caucasians more
than they do Asians. This fits the historical belief that the
caste system was imposed by Caucasians who swept into India
from the northwest.