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B1510F07_L9_EvolMechanisms_cont_withanswer

B1510F07_L9_EvolMechanisms_cont_withanswer - Georgia Tech...

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Biology 1510 Georgia Tech School of Biology Fall 2007 what did Mendel observe?
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Biology 1510 Georgia Tech School of Biology Fall 2007 what did Mendel deduce? inheritance is particulate
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Biology 1510 Georgia Tech School of Biology Fall 2007 Allele frequencies are unchanged from generation to generation if no other processes except (1) Mendelian segregation and (2) recombination are at work. C R C R Hardy-Weinberg Theorem C W C W C R C W C R C R , C R C W , C W C R , C W C W C R C W C R C W C R C R , C R C W , C W C R , C W C W
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Biology 1510 Georgia Tech School of Biology Fall 2007 C R C W The alleles The frequencies C R : p=0.8 C W : q=0.2
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Biology 1510 Georgia Tech School of Biology Fall 2007 p + q are the allele frequencies p 2 + 2pq + q 2 are the genotype frequencies the allele R exists at frequency p; here, p=0.6 the allele r exists at frequency q; q=0.4 What are the genotype frequencies? RR: rr: Rr: p 2 = 0.36 q 2 = 0.16 2pq = 0.48 Hardy-Weinberg Equilibrium
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Biology 1510 Georgia Tech School of Biology Fall 2007 1. infinitely large population 2. no new mutations – no new alleles at a given locus 3. no gene flow – no new alleles coming in or out of the pop.
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