stabilizing selection

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Fig. 287 Stabilizing selection .

stabilizing selection

a type of SELECTION in which both extremes of a phenotypic range are selected against, producing a stable The mean represents the stable average phenotype.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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The maintenance of polygenic variation through a balance between mutation and stabilising selection. Genet.