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Lecture

Biology 3300- Hardy Weinberg

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Department
Biology
Course
BIOL 3300
Professor
Theresa Burg
Semester
Spring

Description
Biology 3300 th Jan.20 Hardy Weinberg Population genetics: Mendelian genetics + natural selection Population: a genetic unit, group of potentially interbreeding individuals and their lifetime F1 allele frequency - Diploid so there are 200 alleles 36AA A = 0.6 48Aa a = 0.4 16aa The population has not evolved, allele frequencies remain the same. Allele frequencies in a population will only stay the same if several assumptions hold true: 1. No net mutation 2. No migration (no gene flow b/w populations) 3. Random mating (allele frequencies font change, genotypes may change) 4. Population is very large (no genetic drift) 5. No selection (all survive and have equal fitness) Scarlet tiger moth - Initially 3 different species turned out to be the same - 3 genotypes and 3 phenotypes Observed: #Ind. Assumed Genotype #A #a White spotting 1469 AA 2938 - Intermediate 138 Aa 138 138 Little spotting 5 aa -
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