Back in middle school (and that was a good 10+ years ago) a doctor came in and said that it is always good to show you are well-rounded. He meant that medical schools like to know you are good at other things (not just biology). This does not have to be shown in your major/minor though, just taking classes in sociology etc can help - but to answer your question I don't think it will help or hurt your chances, like the above people said, GPA/MCAT/EC's count a bit more. I was always taught that an undergraduate degree is really just to prove you can focus for four years and you are capable to learning something - I don't necessarily agree with that, but if your minor is what you want, do it! If not, change it! Just make sure you stay focused and get a good GPA/MCAT 🙂 Hope my rambling helped, and if not, oh well!