Figure 10-54. Life cycle of S. cerevisiae.

Figure 10-54Life cycle of S. cerevisiae.

Two haploid cells that differ in mating type, called a and α, can mate to form a diploid a/α cell, which multiplies by budding. Under starvation conditions, diploid cells undergo meiosis, forming haploid ascospores. Rupture of an ascus releases four haploid spores, which can germinate into haploid cells. Once each generation a haploid cell is converted to the opposite mating type.

From: Section 10.7, Molecular Mechanisms of Eukaryotic Transcriptional Control

Cover of Molecular Cell Biology
Molecular Cell Biology. 4th edition.
Lodish H, Berk A, Zipursky SL, et al.
New York: W. H. Freeman; 2000.
Copyright © 2000, W. H. Freeman and Company.

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