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#1: Continuing = a, incoming = A, selection result = A #2: Continuing = a, incoming = A, selection result = A #3: Continuing = A, incoming = A, selection result = A

Figure 7.13 An example ancestral selection graph showing how natural selection operates in the genealogical branching model. The genealogy on the left shows incoming and continuing branches and their haplotype states. The genealogy on the right shows the final pattern of branch states once all natural selection events have been resolved and states reassigned as necessary. In this illustration, the A haplotype is at a selective advantage over the a haplotype. Haplotype A increases in frequency when the continuing and incoming branches are resolved. See Problem box 7.2.

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