A meiotic mutant of the fission yeast Schizosaccharomyces pombe that produces mature asci containing two diploid spores.
A mutant of the fission yeast Schizosaccharomyces pombe grew normally in the mitotic cycle but produced two-spored asci in the meiosis cycle. These spores were diploid, and the segregation of centromere-linked markers in the dyads was mostly reductional. Only the first meiotic division appears to occur in this tws1 mutant, resulting in enclosure of diploid nuclei into spores.
D001203:Ascomycota / Q000235:genetics*; D002875:Chromosomes / Q000648:ultrastructure; D004171:Diploidy; D005819:Genetic Markers; D008540:Meiosis; D008938:Mitosis; D009154:Mutation; D012568:Schizosaccharomyces / Q000235:genetics* / Q000648:ultrastructure; D013172:Spores, Fungal / Q000648:ultrastructure
D005819:Genetic Markers