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An organism s genome will be a mosaic of relatedness

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Unformatted text preview: ependently 27 3. An organism s genome will be a mosaic of relatedness & differentiation • Between different individuals & populations 28 -mtDNA has an opportunity to develop differently because it remains segregated - Y mixes, therefore it does not have the potential to evolve i ndependently 7 25/02/2013 Does this apply to human populations? Fst 1 Differences • Human marriage customs yield 2 cultural trends – Patrilocality: Females move to the location of their male spouse – Matrilocality: Males move to the locations of their female spouse Genetic Differentiation Predictions: Patrilocality (females move, males stay) Matrilocality (males move, females stay) Y chrom variation within populations Lower Higher Y chrom differentiation between populations Higher Lower mtDNA variation within populations Higher Lower mtDNA differentiation between populations Lower Higher Fst 0 No diffeences 29 Patrilocality: Females move. Males stay -Y variation will be SMALL within, LARGE bet ween -mT will be HIGH within, small bet ween popln's Seielstad, M.T., E. Minch, and L.L. Cavalli Sforza. 1998. Genetic evidence for a higher female migration rate in humans. Nature Genetics 20, 278 280 (1998) 30 -Y: Shows a lot of variation over distances. Evidence of female m igration -The males are staying in 1 location keeping their Y chromosomes i n 1 location. Therefore, from location to location, there will be g reat differences in Y chromosome variation M atrilocality: Males move. Females stay -mtDNA variation will be low within, LARGE bet ween -Y variation will be high within, low in bet ween popln's Can we use the reverse to prove t...
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