<p>I’m just thinking that normally a person would get a BS in Chemistry before working on a PhD in Chemistry (or a sub-field within chemistry) because the courses for the PhD require the basics that one would learn in the undergrad. </p>
<p>This is something I found on BU’s website.
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<p>So maybe try looking to see what the prerequisites are for the graduate program your son is interested in. I’m guessing that he can major in anything he wants as long as he completes the prerequisites for pre-med and the graduate program, but I guess the question is how many prerequisites there are, and whether it would be practical to complete a different major.</p>
<p>Sorry, I know that doesn’t really answer your question.</p>