Rosetta Institute's Cancer/Neuroscience Camps

My son have recently been accepted to Rosetta Neurosciences @ UCSD. He is a rising junior grade 9 student in IB program @ a school in Canada. Since he is in grade 9 (graduating into grade 10 in June), they have not been introduced to high school biology, yet. The school will introduce HS biology in grade 10. He is v. interest in biomedical science with inclination towards Neurobiology. Last year he volunteer with a university research Professor on a project related Post-stroke recovery, and had a good time volunteering in lab, performing data-analysis and the experiencing volunteering in that setup was very enlightening.

My question is that considering, he is a high school junior and not completed high school biology , will he struggle in Rosetta program? I understand the student population in the program variate b/w grade 9 to grade 12, right.

Any suggestion?