Variation in Populations.pdf

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Variation in phenotypes is due to the environment (Ve) and due to genetic differences (Vg). The contributions of each can be quantified. Within genetically identical lines the only phenotypic variation is environmental variation.
Heritability (H 2 )- the proportion of phenotypic variation (Vp) in the population that is due to underlying genetic variation (Vg) Vp = Ve + Vg H 2 = Vg/Vp H 2 = 1 all phenotypic variation is due to genetic differences H 2 = 0 all phenotypic variation is due to environmental differences H 2 = 0.6 60% of the phenotypic variation in the population is due to genetic variation, 40% is due to environmental variation
Page 1 and 2: Variation in Populations Phenotypic
Page 3 and 4: Distinguishing between genetic and
Page 5 and 6: How Genetic Variation Behaves in Na
Page 7 and 8: The difference between the observed
Page 9 and 10: Inbreeding results in greater expre
Page 11 and 12: Although random mating among any di
Page 13 and 14: Even though it is called linkage di
Page 15: The environment can also influence
Page 20 and 21: Correlation between close relatives
Page 22 and 23: Flies with no overall preference fo
Page 24 and 25: The expression of a single genotype
Page 26 and 27: Migration (gene flow) and genetic v

Variation in Populations.pdf

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