Dear rajeshmarndi,
Sweep-back produces a dihedral effect.... (recalled from my fast jet days).
Just as mentioned ... better to understand each concept seperately.
However, they have similar result on lateral stability vis-a vis sideslip/ roll.
You have to imagine this.... sideslip on swept-back inner lower wing makes it a straight wing....thus lift increases on that wing, resulting in a tendency to come out of the roll/ sideslip.
I hope I am making some sense..