So...I made my first extract brew (AHS Bass Clone) and didn't realize until about two hours after the fact that I didn't use all of my hops.

I shorted myself .5 oz of Fuggles @15 minutes.
Is it ok to dry hop the remaining hops? How much of an influence would this have on the end product? Is it better to just leave it be?
On a sidenote, I have never dry hopped so I would need some guidance. I'm going to start reading now.
TIA,
John