It might be best for you to take Genetics this term, for the following reasons:
1. You have a relatively light load this term, and it sounds like Genetics will require more work.
2. Genetics is required for your major, but Anal Chem is only recommended.
3. Genetics is heavily emphasized on the MCAT, but Anal Chem (other than the Gen Chem part) is not.
4. Although P-Chem recommends Anal, it really isn't needed that much. Just make sure your math is up to the level you need.
Then you could take Analytical in a later term or year.
Good luck. Genetics is actually easier for Chem majors, assuming that your course is a molecular genetics course. There is a little memorizing, but not nearly as much as in the other bio courses.