Don't understand exactly what you mean by overlapping, but from my what I saw, I would say so definitely, well for pre-med at least. During my undergrad years I had the same pre-med students in bio 1, 2,, chem 1,2, org chem 1,2, physics 1,2, etc. Mostly science classes. As for pre-dental, I'm sure they took the same anatomy courses we did as well. Most pre-meds are Bio majors, which coincide with much of the courses us pre-pharmers took. As for electives, I had a wide variety of students. Hope that helps.