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. 2013 May 28;45(1):14. doi: 10.1186/1297-9686-45-14

Figure 1.

Figure 1

Changes in the frequency of the alternate B allele in worms when the initial frequency of B is either (i) 0.001, (ii) 0.01, (iii) 0.1 or (iv) 0. Under Scenario 1, there is a 20% survival advantage (sh) for the B allele in sheep carrying the A allele and no mortality trade-off on pasture (sp = 0).