Originally Posted by eama

The logic behind this scheme of inheritance is required to be understood in the light of
the Islamic system as a whole which, while conferring rights, delegates reciprocal
obligations in the context of the circumstances. Accordingly, the arguments extended by
various scholars in favour thereof are as follows:
1. The son is under an obligation to protect and maintain women of his family in
view of the following verse of the Holy Qur’an:
“Men are the protectors and maintainers of women.”
The daughter, on the other hand, inherits her share of the parental property without any
obligations and the moment she gets married, she is entitled to receive a dower amount
from her husband, the payment of which is mandatory.
2. The son is under an obligation to look after the parents particularly in their old
age. Hence, he is a closer relation in terms of benefit as compared to daughters
who leave the parents after marriage.
3. The son has to settle dower for his wife (if he is married), while the daughter is
not under any such obligation.
abstract from research of Dr. Arfa Sayeda Zehra
your link is good one ...
will upload whole research paper soon can help us alot in understanding of this issue as this issue is still under discussion by islamic fiqh acadmy .....