Fig. 2. Aspects of the S. cerevisiae cell cycle. Adapted from J. Thorner, Pheromonal regulation of development in Saccharomyces cerevisiae. In The Molecular Biology of the Yeast Saccharomyces: Life Cycle and Inheritance. Pp. 143-180. Cold Spring Harbor Laboratory, 1981. The magenta and green colors indicate the two different mating types (alpha and a). In diploids, the colors are blended to indicate that the diploid nucleus contains both alpha and a determinants.