But even if the selectivity of the undergraduate doesn’t matter that much, we know that GPA matters a ton, and Ivies have a reputation for grade inflation, whereas many other schools have a reputation for deflating grades in undergrad. Furthermore, more selective schools may have more opportunities for research, and students may have more success getting the classes they want, and both of those might impact applications. Finally, peer group may matter. More selective schools might give me better study partners, which might improve my understanding of the material which might help my MCAT score. Or they might include more advanced information in courses, which might help my MCAT score.