Father died intestate after him grandmother died intestate

Querist :
Anonymous
(Querist) 03 April 2010
This query is : Resolved
My father expired intestate in June 2006 leaving behind a residential house in Chandigarh.His legal hiers at the time of his death were as following:-
1.Wife 25% Share
2.Son 25%Share
3.Son 25% Share
4.Mother 25%
My Grandomother expired intestate in July 2009,how will her 25% share devolve as per Hindu Succession act 1956:-
Firstly as per Section 15(2) which states that “if a Hindu Female dies intestate her property goes back to the source from which she has inherited that property�
Which in this case are the Legal heirs of my father 1\3 each.
Secondly as per Class I Legal heirs of my Grandmother
which in that case include her two Sons & a daughter in addition to legal heirs of the predeceased son .
Kindly Clarify which will prevail & Why with similar case judgements