BIOL208 Lecture Notes - Zygosity, Multimodal Distribution, Common Cause
9 Apr 2014
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What is evolution: evolution doesn"t necessarily cause any visible change. Is the changes in allelic frequencies over time within the gene pool: *is always ongoing, there is no end goal, gene pool = the sum total of all the alleles in a population. What causes phenotypic variation among individuals within a population: mutations can create alleles and this will contribute to evolution, general equation, let: Ve = environmental effects: ex. fertilize plants so that they grow bigger we are not causing evolution by doing this, *vp = vg + ve. What is = nature + nurture: not all phenotypic variations result in evolution since they may not be heritable, *h2 = heritability on a scale of 0 to 1. 0 means that it is completely environmentally determined. 1 means that the trait if completely genetically determined: h2 = vg/vp = vg/(vg+ve, examples: * indicates point that i think are important. Horn size in bighorn sheep h-squared = 0. 69.
