Townsend Harris (New York City)?

I got into Bronx Science and Townsend, but I might be slightly leaning toward Townsend at this point. I, however, have a few questions to confirm my decision. I want to become an orthodontist when I grow up and I understand that Townsend doesn't have physics, chem, or bio as AP courses. They, however, let you take college courses at Queens College (junior yr: college now, senior yr:bridge program), so will they let me take all three courses in Queens College? I don't want to miss out on science while in this school, so will I really be missing out on anything if I choose this school over Bronx? I mean, I thought most of this career related stuff was supposed to happen during college, but apparently its coming up now too...