I think Mr. Sunil Sharma has stopped listening. Let me now take on the Maharashtrian Hindu, Mr. Medhap. I do not want him have the last word. He says that among them cross-cousin marriages are permitted, because they belong to different families. Actually he means different gothras. Even parallel cousins on mother’s side can come from different families (gothras). Do they also marry among Maharashtrian Hindus? Further South from Maharashtra, maternal uncle marries sister’s daughter. The justification is same as what Mr. Medhap says, that they belong to different families (gothras). Whereas such close blood relations marry, no Hindu anywhere in India can marry even the 10th cousin on the paternal side because they would belong to the same gotra. Often it can happen that boy and girl belong to the same gothra but they would not even know whether they had common ancestors. Still they cannot marry.
The marriage rules originate in the belief that inheritance is transmitted only through the male and not the female. The sperm is considered as the seed and the womb, the soil. Seed determines what plant will come out and not the soil. In Christianity the entire humanity are sinners, because they inherit the original sin from Adam. But Jesus Christ was not a sinner, because his father was God Himself.
Whatever various religions say, modern knowledge says that inheritance is from both sides. In order to maintain the quality of the population, let us not justify customs and become the cause for creating sick individuals.