I switched to an English major this semester after being a Geology major. I have 6 hours in biology, 3 hours in chemistry, and 7 hours( I took a lab) in Geology. I’m also scheduled to take General Chemistry II in the Spring. However, I found out that to have a minor in Biology at my school I need another 20 hours of Biology classes, and Organic Chemistry I and II. That would be almost impossible to fit into my schedule with the English and Foreign Language requirements that I have. If I just took another 11 hours of Biology(Evolution, Genetics and Microbiology) would that make me competitive for an entry level job in Medical Writing? How would I write that on my resume since I wouldn’t have an official Biology minor from my University?
What is medical writing? You must get more specific.
You can look at colleges’ official majors and minors in medical writing at http://www.amwa.org/toolkit_new_med_writers#Undergraduate to get an idea of what kind of course work they believe is relevant to those jobs and careers. It is not necessarily the case that such course work will match with the official majors and minors at your school, but you may be able to just take the relevant course work as electives.
There are also some self-study options listed at http://www.amwa.org/education .
Related internships in your desired niche are going to be critical. Journalism employears are going to expect different experience and SKA than pharm copywriting/marketing comm employers/clents or medical journal copywriting employers. Invest time into those internships. What’s your intended career?
I was hoping to work for a pharm/biotech company but it seems like most want hard science degrees.
Thank you so much!
Oops. Excuse all those typos! 
If I take the relevant coursework as electives how will I be able to show that I did that to an employer? Should I give them a transcript?
What you may need is relevant writing samples, some sort of portfolio, some experience. And the coursework isn’t all of it. As a writer you need to have a solid understanding of what you are writing about- whether that be technical documents or user instructions. And be a quick learner. There isn’t much room for error. Just don’t forget the “writer” in “medical writer.”
You may be able to start in pharm in various ways- eg, marketing, where you might build your repertory.
Check with your career services offices about format and opportunities.