chapter 25 - T ypes of Mutations -point mutations -base...

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Types of Mutations -point mutations -base pair substitution transtion: change from pur to pur or pyr to pyr, Transversions: pyr to pur or pur to pyr -these are relatively rare, because DNA polymerase moves quickly and correct so only 1 in ten million bases -recombination - generates new dna sequences, leads to gene duplication or deletion, if genes are duplicated the new gene can retain function lost function or gain new function -transposable elements - segments of DNA capable of moving from one location to another -chromosomal changes- inversions, polyploidy Mutation rates vary among different lineages Hardy-Weinberg -1908 G.H. Hardy and Wilhelm Weinberg -mathematical method to analyze the consequences of mating in populations -imagine a gene pool with all sorts of alleles and combine randomly -serves as a null hypothesis, if rejected then evolution must be occurring -p+q=1 -Five assumptions- no natural selection, no mutations, no genetic drift, no gene flow, and random mating Selection -direction selection: moves a trait value in one direction or another,
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chapter 25 - T ypes of Mutations -point mutations -base...

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