Why has southern blotting been largely superseded by Polymerase Chain Reaction (PCR)?

Question

Why has southern blotting been largely superseded by Polymerase Chain Reaction (PCR)?

Answer 1

you don't need as large a DNA sample to do PCR as you do southern blotting. it is also cheaper which is a HUGE factor!

Answer 2

First, three points for spelling superseded right.

PCR requires much less DNA, it's far more specific, and is just easier.