Grad School Vs. Undergrad

I did poorly in undergrad (but at a good school- Lehigh) largely because I got sick and was dealing with my illness for several years. I scraped through with a 2.1 average (though about a 1/3 of my credits were transfer credits because I had to withdrawal several times and attended other schools). I went on and decided to go to get my MBA which I did from a pretty good school (Fordham) and graduated near the top of my class with a 3.72 average. Am I screwed because of my undergrad despite having done much better and at a much higher level of academic rigor? I've heard that they largely weight undergrad because its part of ranking criteria ect.