Just looking at how the system works, IMO I don't think admissions give a damn what classes you take as long as they look somewhat challenging and meet the requirements. They might be interested if you took a couple interesting classes and ask you why you chose to take them. As for consideration for taking the upper levels, I don't think there's any. If they want to see competency they look at the MCAT 🙁
I know...I wasn't very happy about it either. The quicker you accept it and just work hard the better it is I feel. I mean, this is just my 2 cents but think about it, why is it that .1 of your GPA is worth a point on the MCAT. The MCAT is a very serious test and that's where they compare apples to apples. They don't care if you've spit out the various biochemical pathways or memorized all the characteristics of various pathogens. Yes, it's easier for the humanities majors because they don't have to be weighed down by the science courses. They have to study for the MCAT but let's face it, you don't need the an upper level bio course to help you with those (though they can help at times). One of my biggest regrets is not doing a different major and just taking BCPM+genetics+biochem+physiology. Everything else I should have just steered clear of. This whole major thing IMO doesn't suit pre-meds because most of them like me will get tricked into take all these rigorous science courses thinking it's what needs to be done and that they're prepping for medica school. Well yes they are but they're inevitably going to forget a lot of it and it's going to drain a lot of time they could have spent doing something else that's interesting and rewarding. Someone tell me if they disagree, I'd like to hear any argument that has made my major in human biology seem worth the trouble. Ya first year might be easier but that's not a big deal and I'd rather take the time to study something different from biology when I had the chance. Lol, put medical in any class description and the class fills up with premeds. If any freshman are reading this, I strongly advise you to major in something besides a biological science. Keep genetics, biochem, and physiology in your rotation though.