Answer
(Fatwa: 549/529/N=1434)
In the presence of sons, the grandsons and granddaughters are not entitled to get any share in the inheritance. Hence if at the time of your grandmother’s death both of your uncles or one of them will be alive then you shall get no share in the property of your grandmother as in the inheritance of grandfather. Yes, if, during her life time, your grandmother gives you some share and hands it over in your complete possession or she makes a will in her one third property for you then you people may get share in her property as per hibah and wasiyat respectively.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband