Time-dependent medians (solid curves) and 95th percentiles (dashed curves) for the asymmetry index *A* [*i.e*., *P*(*A* ≤ *a*) = 0.5 *vs*. 0.95] when both U and B DMIs contribute to reproductive isolation between lineages. (A) The effects of varying *C* with η = 1, *h*_{0} = 0.1, α = 0.75, δ_{1} = 0, and CV = 0.5. The curves are *C* = 5 (black), 10 (red), 20 (green), 40 (blue), and 100 (orange). (B) The effects of varying α, the shape of the fitness function, with *C* =10, η = 1, *h*_{0} = 0.1, δ_{1} = 0, and CV = 0.5. The curves are α = 0.5 (black), 0.75 (red), 1 (green), and 1.5 (blue). (C) The effects of varying δ_{1} (which controls expected differences between reciprocal breakdown scores) with *C* =10, η = 1, *h*_{0} = 0.1, α = 0.75, and CV = 0.5. The curves are δ_{1} = 0 [*E*(*S*_{12}) = *E*(*S*_{21}), black], δ_{1} = 0.166667 (υ_{1} = 2υ_{2}, red), δ_{1} = 0.3 (υ_{1} = 4υ_{2}, green), and δ_{1} = 0.4 (υ_{1} = 9υ_{2}, blue). In addition to the median and the 95th percentiles, the 5th percentiles are shown as dotted curves. (D) The effects of varying CV with *C* = 20, α = 0.75, and δ_{1} = 0. The curves are CV = 0 (black), 0.25 (red), 0.5 (green), and 1.0 (blue).

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