Mutations preventing transpositions of yeast mating type alleles
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چکیده
منابع مشابه
Mating type and sporulation in yeast. I. Mutations which alter mating-type control over sporulation.
In Saccharomyces cerevisiae, meiosis and spore formation as well as mating are controlled by mating-type genes. Diploids heterozygous for mating type (aalpha) can sporulate but cannot mate; homozygous aa and alpha-alpha diploids can mate, but cannot sporulate. From an alpha-alpha diploid parental strain, we have isolated mutants which have gained the ability to sporulate. Those mutants which co...
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Saccharomyces cerevisiae, baker’s yeast, can exist in either a haploid (1n) or a diploid (2n) state. Haploids express one of two mating types, a or a (alpha). Haploids of either mating type are capable of mating with haploids of the opposite mating type in response to the action of mating pheromones. Mating results in fusion of haploid cells, forming an a/a diploid, which is no longer capable o...
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alleles a and CY govern the mating reaction in Saccharomyces cereuisiae T y E ~ ~ ~ ~ ~ ~ ~ and LINDEGREN 1943). High-frequency mating is obtained when haploid a or diploid a a cells are mixed with CY or 01 CY cells (ROMAN, PHILLIPS, and SANDS 1955). Matiings of cells of like mating type are rare and have been observed, in fact, only between CY cells. The mating type alleles also govern spomlat...
متن کاملSilent Mating-Type Loci in Fission Yeast
In Schizosaccharomyces Pombe the mating-type information is stored at two transcriptionally silent loci (mat2 and mat3). The region between these sites ( K region) is inert for meiotic crossing over. The mating-type genes (M or P) are expressed only when present at a third, active locus (matl). We have earlier shown that the positional regulation of P genes is based on repression at the silent ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1980
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.77.5.2824