For graduate study we often hear that it doesn’t matter where you go for undergrad as long as you get a very high GPA! But when you look at the demographics of gratuate students in prestigious universities you see most are coming from elit (undergraduate) schools as mentioned by @SlippinJimmy as well!
(I often ask myself why a medical school should not differentiate (contrary to what we often hear) between two premeds with the same GPA of 3.9 …one coming from a cutthroat school such as UCLA (where my daughter is pushing herself to extreme to maintain such a GPA) and another coming out of an easy school such as ***(not mentioning any name lest offend someone) where even a 4.0 is not that hard to gain?)