Mating Type Determination in Yeast

The single-celled eukaryote Saccharomyces cerevisiae, is widely used as a model organism in molecular biology and its major characteristics have been summarized in Chapter 2. Here we will consider its sex determination system. Yeast can live either in the haploid or the diploid state. Both types of cell are structurally and metabolically gene conversion Recombination and repair of DNA during meiosis that leads to replacement of one allele by another. This may result in a non-Mendelian ratio among the progeny of a genetic cross

A. VARIABLE REGION REPLACEMENT: I EARLY

Non-expressed copy

Non-expressed copy

Gene conversion

Non-expressed copy

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