Figure 2From: Adaptation of gastrointestinal nematode parasites to host genotype: single locus simulation modelsFrequency of the alternate B allele in worms after 80 generations when the interacting A allele in sheep is (A) 0.2, (B) 0.5 or (C) 0.8. Under Scenario 2, the B allele survival advantage in sheep carrying the A allele (s h , y-axis) and pasture mortality (s p , x-axis) range from 0 to 30%.Back to article page