Please be aware of the prevailing law of the land on the meaning of 'Ancestral Property"
Just becasue the property belonged to your grandfather, it cannot be termed as 'ancestral property'
The property inherited by your father from his father shall be his own and absolute property besides his own self acquired property.
Your father who has transferred the property to his sons and your mother by registered partition ded and settlement deed has full rights to do so and his authority over this or this transfer cannot be questioned by anyone.
He has full rights to dispose his own and absolute properties in the manner he may desice as per his desire and to the persons of his own choice.
You cannot compel him to allot you any share out of his property when he is not willing to to it.
Even if you would file any partition suit, it is not maintainable in law and finally it will turn out to be a waste of time, money and energy, because as per law you are not entitled to any share in your father's property as a right hence you may not succeed.
Instead you may try some other method to get a share of property from your father by arranging a meeting involving elders of the family and arrive at a consensus to fetch you some fruit.