What happens if there is no will and there are 2 sons?

Any assets of the decedent will be distributed according to the intestacy laws of the state the decedent lived in. Usually the remains of the estate (what's left after all the bills are paid) are distributed in the following order: surviving spouse, surviving children, surviving grandchildren, and any other surviving descendants. If there are no surviving decedents, the estate would go to the decedent's surviving parents, then surviving siblings (by birth or adoption), and then surviving descendants of siblings. In your case, the estate would probably be distributed equally between the two sons.