kamaal haan yarron aap log science, Ph.D, social issues, genetic issues sab pe lad liye toh chalo Law ki bhi baat ho jaaye, first of Law Our Hindu law prohibit only two marriage those between sapindas and between Prohibited degree
1. Sapinda those whom we offers Pinds in Kanagat.
2. Prohibited degree means relationships like, Mother and son, Father and daughter, brother and sister. i.e means in half Blood ,full blood and Utrine blood , Full Blood means means when Both Son and daughter from same father and mother , Half blood when one from other mother but same father .and last when from same mother but by different fathers. and it also includes, Mama Bhanji i.e Father and daughter Chaha Bhatiji i.e Father and daughter. Tau and bhatiji same , Mausa and bahtiji , Mama and bhatiji and all of these son and daughters interse are Brother and sisters same in case of female also ,now the question is about same Gotra ,as per law, Gotra never means they are bound by Full ,half or Utrine blood, they are just considered as related by same community and law not prohibited community it prohibit only family, society declare them family then when a Daughter of any Jat family need help then no one came in front, when same chaha destroys other faily then Community not came in front nd always says its their family matter then why in case of marriage the word family become so big it includes whole Gotra and khap . at last cut it short being a Law expert and having knowledge of Hindu as well as other legal aspect , i can say one thing Gotra marriage is truly and fully valid in the eyes of law . Supreme court / High courts/ District courts, law at every state at every place agrees with that .