Saccharomyces cerevisiae Cell Life Cycle
Diagram of the yeast cell cycle.
In the fist half of the figure, gray and white represent cells of opposite mating types called a and alfa. The diagram is self-explanatory. In the second half of the picture, just like the cell cycle of other eukaryotes, the yeast cell cycle drawn here is divided into a G1 phase, which precedes the initiation of DNA replication; an S pahse, during which chromosomal DNA is replicated, a subsequent G2 phase, and an M phase during which mitosis and nuclear division occurs.