<p>What is the difference between the two?</p>
<p>“basis of” is the correct idiom. “basis for” should not be used</p>
<p>I disagree with the previous poster. While there is occasional misuse of “basis for” for “basis of” both are correct in context.</p>
<p>Space-time paradoxes form the basis for many science fiction movies.
There is an evident genetic basis for strong math ability.</p>
<p>You are correct. Hopefully the example sentences will help here. Merriam webster used a “basis for” sentence [Basis</a> - Definition and More from the Free Merriam-Webster Dictionary](<a href=“http://www.merriam-webster.com/dictionary/basis]Basis”>Basis Definition & Meaning - Merriam-Webster)
Dictionary.com used “basis of” as well [Basis</a> | Define Basis at Dictionary.com](<a href=“Basis]Basis Definition & Meaning | Dictionary.com”>Basis Definition & Meaning | Dictionary.com)</p>