BIO 101 Chapter 14: Bio Ch 14
7 Nov 2016
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Pop. s: groups of individ. s of same species living together in same geographic area. Exp. in/on our bodies: most: harmless or even beneficial but some can cause disease. Genetic variation: within any pop, in a pop. , gives rise to corresponding phenotypic variation in the pop. Pop. s of sexually reprod. org. s acquire genetic variation by mutation. Asexually: acquire genetic variation by mutation & gene transfer. Individ. s w/ diff. phenotypes will have diff. ability to survive & reprod. in a pop: they differ in fitness. Natural selection: the differential survival & reprod. of individ. s in a pop. over time in response to env. al pressure (change of allele freq. s, one cause of evolution. Adaption: process by which pop. s become better suited to their env. as a result of natural selection. Evolution: a change in the allele frequency of a pop. over time, individ. s w/ higher fitness in given env. reprod. & pass on alleles more freq. than individ. s w/ lower fitness.
