BIO 345 Lecture 1: BIO 345- Allele Frequencies (Friedman)

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11 Dec 2017
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Of evolution is genetics (at the population level) The change in allele frequency over time. Ways to describe genetic frequency: phenotypes (what we see) Phenotypic frequencies are 0. 1, 0. 3, and 0. 6 respectively: genotypes (# of loci/# of alleles) Note: being able to do this will be a question on the exam: activity. Note: being able to do this will be a question on the exam! Frequency of g = 340/600 = 0. 57 p . Frequency of g = 260/600 = 0. 43 q p2= (. 57)2 = . 3249 expected gg value. 2pq= (2)(. 43)(. 57) = . 4902 expected gg value q2= (. 43)2 = . 1849 expected gg value. Check these values found with the values found on slide 9. They should be very close or the same! If not, the population is not at hw equilibrium. Increase sample size, increase the chance of it being the true frequency.

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