BIO 200 Lecture Notes - Lecture 7: Allele Frequency, Genetic Drift, Assortative Mating
26 Sep 2016
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Document Summary
Microevolution: what causes evolution, allele frequencies: a critical measure, gene flow, non-random mating, genetic drift. Incorrect readings: a variety of point mutations: chromosome level mutations, aneuploidy and polyploidy, causes and effects of mutations. Allele: one of a number of alternative forms of the same gene (flower color) Exists at a locus (particular site on a chromosome) The number of times an allele occurs in the population. Frequencies represented as a proportion of the whole (decimal form) Ability to roll = rr or rr. Proportion of non-rolling allele . 25: population. A group of organisms/individuals from a single species that interact in same place at same time. Evolution governed by 4 internal genetic forces - what drives evolution. Genetic drift - random process that plays a role in which alleles survive and which don"t. Mutation, recombination, and genetic drift are non-adaptive forces. Can add gene flow and non-random mating.
