I mostly do not have experience with the specific schools where you got accepted. I do have plenty of family members who were heavy on the “biology” side of things, including a daughter currently getting a PhD in a biomedical field and another daughter who is a veterinarian. The pre-vet required classes are the same as the premed required classes, so she took the full list of them and both daughters knew quite a few premed students.
The first thing that comes to mind is that for someone getting a bachelor’s degree in biology, some form of graduate school is relatively likely (whether medical school or something else). PhD’s are typically fully funded. Master’s degrees are not. Medical school is typically not funded, is another four years, and is typically very expensive.
If you want to keep the option open of ever attending medical school, then you need to budget for a full 8 years of university. You do not want to take the full cost of medical school as debt, this would be way too much debt. Even if you take a different track but stick with the biology major, you probably are better off budgeting for 4 years of undergrad, plus two years for a master’s degree, followed by a relatively modestly paying job. You do not want to take on much debt for the full 6 years if you end up going for a master’s degree. For students who go on for a PhD, some will do this after just a bachelor’s degree, and some will get a master’s first. Admissions to PhD programs in biology can however be exceptionally competitive.
I do not know much about Chapman. What I have heard is quite positive. I have also heard positive things about all of the other schools that you were accepted to. With a daughter who is a veterinarian, of course I am very well aware how excellent UC Davis is for veterinary medicine. One oddity there is that the premed classes at UC Davis will not only have many very strong premed students, these classes will also have many very strong pre-vet students (who will compete for grades in the classes, but will not compete for human medical shadowing opportunities since their medical shadowing will be with cows and horses and a wide range of other animals).
Some families are fine paying something like $800,000 per child for eight years of university without taking on debt and without any hardship. The vast majority of families are not able to afford this much for university. Find out what your budget is for a full 8 years, and keep this in mind.
The universities of California are great schools if you are in-state, but are expensive if you are out of state. Make sure that they will charge you as out of state. I think that Tulane and Binghamton are very good choices. From what little I know it sounds like Chapman is probably a very good choice also. Any of these can help you be prepared for and get accepted to good graduate programs (whether medical or otherwise).
One more thing that might be worth mentioning: At one point I asked two doctors I know where other students in their MD programs got their bachelor’s degree. One said “all over the place”. The other said essentially the same thing but without the easy to remember quote. At the opening reception for one daughter’s DVM program I got to hear where each student got their bachelor’s degree. Again the answer is “all over the place”. I can see on-line where every student in my other daughter’s PhD program came from, and again the answer is a very, very wide range of undergraduate colleges and universities. Some are ranked higher than any school you are considering (eg, there is one student from Harvard in her PhD program), some are from schools ranked lower than anything that you are considering, and quite a few are ranked about the same as the various schools that you are considering. Ranking really does not matter, and there are a huge number of schools that can prepare you very well to apply to graduate medical/biomedical programs (whether MD or something else) and that can prepare you very well to do well in the program. Premed classes will be tough at any of these schools, and will be full of very strong students at any of these schools.
All of which can be summarized as: Keep your full 8 year budget in mind, and wherever you go show up on day 1 planning to work very hard and make a strong commitment to staying ahead in all of your course work.
Best wishes.
