To be honest I think it depends on where you will be attending and the demographic. I know that sounds shallow and superficial. I think in more liberal areas it would be OK, but more conservative areas might have an issue. It would also depend on the field. For instance ER doctors, I don't think most people would mind they are in need of urgent care. Some positions you might not be taken seriously. Personally I think that's awesome and would keep them. That's just my opinion though.
first I think that it is really cool that you're keeping them for your sister (r.i.p.) :) I do think it does have to do with the demographic of wherever it is you are applying, I would have no problems with it, in fact I would respect the doctor/medical staff all the more, because I would see it as an outward/subtle way of rebelling against the typical clean cut, clean shaven persona the most medical personnel have... hope that helps :)