1)
What if there are no brothers, only sisters?
1.
Torah Temimah, (citing R. Bachye): The deceased's sisters too, take precedence over his uncles. 1
1
See Torah Temimah, note 24.
2)
Why does the Torah present the case of a father inheriting by way of a hint and not directly?
1.
Ramban: Because for a child to die in the lifetime of his father is a curse, and the Torah is reluctant to discuss curses directly.
2.
Oznayim la'Torah: Because, based on the fact that the relationshoip between the father and son is two-ways, there is a principle ''Kol Manchil, Nochel' -'Whoever bequeaths, inherits'.
