Double major in Biology and Physics, is it possible and for how long?

I will be transferring to UCSC as a junior. I already have over 100 credits and all my basic general ed and IGETC done. I have diverging interests in Biology and Astrophysics. I was thinking about doing a double bachelors for both of those majors and then deciding a focus for graduate school after I have both majors under my belt. Is it too much of a work load? And how long would it be to graduate with both?

Physics BS: 16 upper division courses http://undergrad.pbsci.ucsc.edu/physics/physbs/physbs-requirements.html
Astrophysics BS: 17 upper division courses http://undergrad.pbsci.ucsc.edu/physics/asphbs/asphbs-requirements.html
Biology BS: 10 upper division courses http://undergrad.pbsci.ucsc.edu/biology/biolbs/biolbs-requirements.html
Biology BA: 8 upper division courses http://undergrad.pbsci.ucsc.edu/biology/biolba/biolba-requirements.html

It would be a tight fit, and may require slight overloading, but you could barely fit both majors in six quarters (probably 4 courses per quarter is typical, so 24 courses over six quarters is typical).

However, if you have some lower division courses to complete that were not available at your prior school, or have some additional general education requirements to complete, then it may be less feasable to do the double major.

In addition, it may be better to focus on one major and take electives in the other according to your interest. You could start off taking courses for both majors in the first quarter(s) after transfer and then choose one of the subjects as your major and just take a few electives of interest in the other. This can allow you to take additional courses in your major for better preparation for graduate study in that subject.

Thank you so much this gives a real idea of what’s actually realistic.