BIS 2B Lecture Notes - Lecture 14: Stabilizing Selection, Birth Weight, Heritability
27 Oct 2018
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Case studies of natural selection in action finches : weather event (hard selection event) Bumpus" caused extreme mortality small birds preferentially survived. In order to say its natural selection we need to know if body size is a heritable trait. Case study: stabilizing selection on human birth weightnot the same as stabilizing selection. Selection toward a mean, usually in a polygenic quantitative trait. Balancing selection the advantage that heterozygotes have over either homozygous state. Favors individuals that are either above or below the average phenotype. Favors individuals that are both above and below the average. : heterozygote advantage (heterosis) over homozygous state. (refers specifically to. Warfarin is an anticoagulant/blood thinner that prevents vitamin k from complexing with coagulants in blood. Non-resistance rats that eat warfarin bleed to death. In 1959, warfarin-resistant rats appeared in rat populations in uk. Warfarin resistance conferred by a single mutation at the w-locus.
