If someone were looking to major in biology in college what classes should they take in high school?

If you were to plan on majoring in biology in college, I would suggest that you attempt to take AP Biology, Advanced Biology, Genetics, Anatomy, Chemistry, and try to take as much math as possible, particularly Algebra II, AP Calculus, and AP Statistics. On top of those basic courses I would suggest AP Literature classes because you may learn latin roots; which will help you to understand the terms used throughout biology.