SDN Members don't see this ad. (About Ads) Hey there! First off, I apologize if this question has already been asked, I'm just curious. What if a person started off undergrad bad, with over 5 C's in science courses, especially those that are prerequisites for med-school, then later retakes all of those courses and gets A's and also graduates with a BS or a Masters in a program. Do med schools view the undergrad class retakes as bad since there were so many? How does this affect GPA? Do the retakes replace the first grade, or are they averaged? I know it might differ depending on the school policy, but what's been your experience with this issue?