BIO 4130 Lecture Notes - Lecture 13: Mate Choice, Ring Species, Zygote
9 Jul 2020
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Upon secondary contact/migration, allele combinations are lethal (cid:12254) (cid:12254) (cid:12254) (cid:12254) Process whereby individuals with certain heritable characteristics in a particular environment (i. e. , adaptations) survive and reproduce more successfully than individuals with other characteristics. Genetic contribution of an individual"s o spring to future generations (cid:12254) Individuals with one extreme of a heritable phenotypic trait are favored. Example: medium ground nches in the gal pagos islands. Beak size is correlated with seed size and is heritable. Drought in 1978 reduced seed abundance leaving only large seeds; this favored large beak size in medium ground nches (cid:12254) Individuals with an intermediate heritable phenotypic trait are favored. Parasites and predators of eurosta gall ies result in stabilizing selection. Parasitic wasps prefer small galls; predatory birds prefer large galls (cid:12254) Individuals with both extremes of a heritable phenotypic trait are favored. Physiological and genetic adaptions to diving in sea nomads via natural selection.
