F13 lecture 8 v2

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Unformatted text preview: q=1 (by driU in the simplest model) •  FST increases because HS decreases •  HS decreases when alleles are fixed because maximum H is when p=q=0.5 Which of the following is not true about migraGon? A.  MigraGon can occur without gene flow B.  Gene flow can occur without migraGon C.  MigraGon tends to keep allele frequencies between subpopulaGons the same D.  MigraGon is a source of new geneGc variaGon for a populaGon more on FST •  most species http://bugguide.net/node/view/455724/bgimage –  FST ~0.15 or less (modest isolaGon between subpopulaGons) –  Sewall Wright •  0.05 – 0.15 ; moderate differenGaGon •  0.15 – 0.25; great differenGaGon •  >0.25; very great differenGaGon •  e.g. willow leaf beetle Chrysomela aeneicollis –  among different river drainages, FST=0.04 –  among locaGons within a river drainage, FST=0.02 –  (Rank 1992) another example Phlox cuspidata Pgm- 2 allozyme locus 43 subpopulaGons FST = 0.38 this species has...
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