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Genomewide segregation distortion caused by segregation distortion loci (SDL). Top: genotype frequencies across the genome when there is no SDL. Middle: distorted genotype frequencies caused by a single SDL (at 150 cM). Bottom: distorted genotype frequencies caused by two SDL (at 80 and 220 cM). Areas with cross-hatched lines represent homozygotes and the area with parallel lines represents the heterozygote.
