The custom for asking for *Gotra* before marriage is still continuing. The aim behind this is that the marriage should not take place in the same *Gotra*. Marriage should also be done in a different Gotra. In shashtras *Sagotra* marriage is considered as scornful and against the religion.
According to *Manu Smriti (3/5)* -
*Aspinda cha ya matursagotraa cha ya pituh |
Sa prashastaa dvijatinaam darkarmani maithune ||*
It means marriage should be done with the girl who may not be in six generations of the mother and not from the *Gotra* of the father.
डीएनए एक हो जाता है जो की अलग अलग होना चाहिये