mr. madhusudan it doesnot matter property is in name of father or the mother, property of both belongs to the legal heirs in any case.
as you told that your father is not willing to make a "will" neither he does not want to give you share in property then there are two ways to deal with this problem as per my intellect and experiance;
1. deal with it inside your house and enter into compromise with your brother and father about the issue. As good son you should not be concerned about the property you will get in the partition, you should be more concerned about taking care of your father and family.
if you have skills and talent you will earn your own money and property one day.
2. Second option is the law way, taking help of legal remedies and filing suit against your own family and take your share through court. I would not recemend that but in any scenario that is your legal right and you can move anytime to the court for the enforcement of your legal right.
now the main issue is that your father does not want to give share to you and in his position he can do so as he is the whole sole owner of the property right now, he can also exclude you in the "will" but then also he can not completely exclude your share in paternal property acc to Hindu succession act.
the only way he could make sure that you does not get any share in his property is that if he mentions in the transfer of property/registration as "sale" to his son. that means he has not transferred the property to his one son but he has sold it, in that case your right to sue your father/brother is completely gone.
So you need to make sure that your father doesnot sell(not in real sense but to exclude you) the property to your another brother, becasue if he does so your every right to get a share is lost.
And the second thing you need to make sure is, (it will be hard for you i guess)- forget the property serve your father and take care of him in last days of his life and do not be greedy for property because even if in the end you do not get the property in that case also you will have the satisfaction in your heart that you did your part of being a son and completed your duties towards your parents in full faith and care.
The work of a real advocate is not to take the parties directly into court and extract money from them, the real advocate is the one who could solve the problem of clients out of the court and show them a righteous path---- litigation must always be the last option.
hope that helped mr madhusudan and i am sure you will consider my advice.
KINDLY READ IT TWICE !