Biology 1001A Lecture Notes - Lecture 12: Genotype Frequency, Allele Frequency, Allele
3 Apr 2016
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Product rule still works to predict genotype frequencies, but allele frequency not always. Assuming 50% of one sperm is holding one allele and 50% of other sperm is holding other allele. In a population, allele frequencies the chances aren"t always 50/50. In a large, random-mating population, where mutations are rare enough to be ignored, in the absence of immigration or emigration, and there is no selection. If all are true, we can say population is at hardy-weinberg equilibrium. 1: allele frequencies of one generations = allele frequencies of another, allele frequency is constant. After one generation of random mating, genotype frequencies predictable from allele frequencies (p2=a1a1, 2pq=a1a2, q2=a2a2) To recognize evolution, we need to know what a non-evolving population looks like. If genotype frequencies can be predicted from allele frequencies, population is in hardy- Allele frequencies will not change while this is true: tells us one or more condition is violated and population is evolving.
