What are the rights of women in parental and ancestral property?

I'm a married Hindu woman of age 52 years. My father expired, without a will, in the year 2000, December. My mother expired in 2006, without a will. I have an elder brother. I would like to know what my rights are. Am I entitled to a 50% division in my parents' property? There are 3 properties - 1)A flat that my mother inherited from her mother. 2)My late father's flat. 3) Ancestral house of paternal grandfather. My grandfather died without a will. He had 6 sons, including my father. Hence, my father had 1/6th share in that property. My question is what is my legal entitlement? Am I entitled to 50% or some other percentage?