Why are marriages banned in the same gotra?

All the men and women born in the same gotra of father, and belonging to his varna are called gotri brothers or gotri sisters in Hindu Sanatan Dharma. That is why marrriages are banned amongst sagotra (same gotra) brothers and

brothers and sisters.”

“Its scientific aspect is that just as marriages in extremely different castes bring distortion, likewise unusually common marriages in the same gotra and its sub-varieties are undesirable. The main reason of marriage in the same varna but outside the

Gotra is that in unusually common contacts there is nothing special which is added to the basic object. There is no reaction of either attraction or repelling. By mixing the same common milk to the milk of the same varna nothing extraordinary results. But if a little yoghurt is

By mixing the same common milk to the milk of the same varna nothing extraordinary results. But if a little yoghurt is mixed into the common milk, then it not only converts it into curd but adds special properties of organising butter elements also.
The simple formula of marriage

is that the marriage should not take place outside caste, as well as it should not be with extremely common persons in the same varna and caste. From the scientific point of view the best physical, mental and spiritual relationship takes place between people.