The Hardy - do change from one generation to the next...

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The Hardy-Weinberg Law This law states an equilibrium of allele frequencies in a gene pool (using a formula p 2 + 2pq + q 2 ) remains in effect in each succeeding generation of a sexually reproducing population if five conditions are met. 1. No mutation: no allelic changes occur. 2. No gene flow: migration of alleles into or out of the population does not occur. 3. Random mating: individuals pair by chance and not according to their genotypes or phenotypes. 4. No genetic drift: the population is large so changes in allele frequencies due to chance are insignificant. 5. No selection: no selective force favors one genotype over another. These conditions of the Hardy-Weinberg law are rarely met, so allele frequencies in the gene pool of a population
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Unformatted text preview: do change from one generation to the next, resulting in evolution. We can now consider that any change of allele frequencies in a gene pool indicates that evolution has occurred. The Hardy-Weinberg law proposes those factors that violate the conditions listed cause evolution. A Hardy-Weinberg equilibrium provides a baseline by which to judge whether evolution has occurred. Hardy-Weinberg equilibrium is a constancy of gene pool frequencies that remains across generations, and might best be found among stable populations with no natural selection or where selection is stabilizing. Microevolution is the accumulation of small changes in a gene pool over a relatively short period....
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