property division among the wife, sons & daughter

My father purchased one building having ground and first floor in Basavanagudi Bangalore. Registered the ground floor under his name and first floor under his wife's ( my mother ) name in 1982. My elder brother doing business and is living with his working wife is ,having a own house in a different village. I am staying in first floor of Bangalore house and working in a private company. My younger brother is doing business in ground floor of Bangalore house, and my mother is living with him. Now my mother has registered the first floor to my elder brother's name. Am I entitled to any share in this property?