At both Washington and UCSD, biology majors are capacity limited and may be competitive admission, if you do not have direct admission to the major as a frosh. So you may want to check whether (a) you get direct admission to your desired major, and (b) if not, how difficult it will be to enter your desired major at each school if you enroll as an undeclared student.
http://www.washington.edu/students/gencat/academic/bioc.html
https://biology.ucsd.edu/education/undergrad/admission/capped-major.html