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Diagrams depict chromosome segregation patterns in the tripolar and tetrapolar crosses. The SXI1α and SXI2a homeodomain genes were relocated at the URA5 genomic locus on another chromosome in the “α” and “a” strains. “STE3α+MFα” and “STE3a+MFa” represent the pheromone and pheromone receptor loci.
