Agreed with the above. Almost all schools like to see some kind of biochem, some behavioral sciences, and some stats/calc type math course. I don't think you necessarily NEED them, but if you want to guarantee being competitive in all aspects, it can't hurt if it is possible for you to take the courses both time and money wise. It might not come down to that when a school is making a decision on you...however if you and another applicant are nearly identical and the other person has a lot of courses under their belt that they like to see, it just might rule you out. Outside of making you competitive, some of those recommended courses, like biochem and genetics, will greatly benefit you in school.