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. 2008 Oct;180(2):1087–1093. doi: 10.1534/genetics.108.093518

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Copyright © 2008 by the Genetics Society of America

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Figure 1.— — De Finetti diagrams describing the set of possible genotype frequencies for two segregating alleles. The solid line represents genotype frequencies that satisfy the equation . Stable equilibria are solid circles, and unstable equilibria are open circles. Hardy–Weinberg proportions are denoted by a dashed line. (A) Neutrality (Φ = 2). (B) Overdominance (Φ > 2). (C) Underdominance (Φ < 2). (D) Directional selection of a dominant advantageous allele (Φ > 2). (E) Directional selection with multiplicative dominance (Φ > 2). (F) Directional selection of a recessive advantageous allele (Φ < 2).

Inline graphic — De Finetti diagrams describing the set of possible genotype frequencies for two segregating alleles. The solid line represents genotype frequencies that satisfy the equation . Stable equilibria are solid circles, and unstable equilibria are open circles. Hardy–Weinberg proportions are denoted by a dashed line. (A) Neutrality (Φ = 2). (B) Overdominance (Φ > 2). (C) Underdominance (Φ < 2). (D) Directional selection of a dominant advantageous allele (Φ > 2). (E) Directional selection with multiplicative dominance (Φ > 2). (F) Directional selection of a recessive advantageous allele (Φ < 2).