Is it too late to pick a minor during your junior year of college?

I am going into my junior year of college next year and I am a biology major with a concentration in biomedical sciences. However, just out of curiosity, is it possible to pick a minor and take the classes to achieve that and graduate on time? I was considering doing that but I don’t think it’s possible.
Is it too late to pick a minor during your junior year of college?
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