In addition to the major subject Biology, it is possible to choose a 30 ECTS Master's minor degree program (Master's degree 90 ECTS + 30 ECTS, registration starting from fall semester 2016). A Master's minor degree program can follow consecutively on a Bachelor's minor degree program, but this is not a prerequisite. All minor programs offered by the University of Zurich are available.
In particular, it is possible to acquire the subject-specific scientific requirements for the "Lehrdiplom für Maturitätsschulen" in a second subject by combining a minor of 60 ECTS in the Bachelor and a 30 ECTS minor in the Master program.
Note that the Master's thesis project in Biology takes one year of full-time study. Any minor degree program must be planned in consideration of this.