How is the ancestral property distributed

My father has two late brothers who has 3 sons each (total 6 nephews for him). My father has me 1 son and one daughter.My grandfather has died. My grandmother is giving the assets as 3 equal parts. 2 parts is shared by my fathers 6 nephews.My father told us it is difficult to give me a single whole part, as others are sharing as 1:3. So he is registering the 3rd part in his name itself under "Dhana settlement".We dont know whether we have rights over the property my grandmother is giving my father.My father is good person but short tempered and consider as family only for the outside world?