How much math is involved in do school?
Very little. If math happens to be one of your major weaknesses, you always have your fingers and toes to assist you.
Also, how much genetics in med school?
As for genetics, I think you do need to have some familiarity in the subject. I think that most medical schools do require applicants to take at least one basic genetics course.
Anyways, you shouldn't worry so much. You'll be fine. 🙂
Good luck.