Biology letters 2006 female wing infection rate 30 08

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Unformatted text preview: t found on Big Island of Hawaii Teleogryllus oceanicus (field cricket) From Zuk et al. Biology Letters, 2006 female wing Infection rate 30% 0.8% normal male wing flatwing male wing female wing Teleogryllus oceanicus (field cricket) From Zuk et al. Biology Letters, 2006 Natural selection produces adaptation Photos: Dr. James Castner. 2. Are organisms perfectly adapted? NO " " Constraints will often exist:" " "" "i. Ecological constraints" " "a. Conflict over different sources of fitness " " " "(selection is complex)" "ii. Constraints on selection" " "a. Mutation can oppose selection" " "b. Gene flow can oppose selection" " "c. Genetic drift can oppose selection" Take home messages: Evolution is more than Natural Selection Evolutionary forces interact New variants " Evolution " (change in allele frequency) " Change in frequency" of variants in " next generation" Mutation " new alleles " New variants " Gene flow " Evolution " influx of alleles " from other populations " (change in allele frequency) " Genetic drift " Change in frequency" of variants in " next generation" chance changes in allele frequencies " Selection " causal changes " in allele frequencies " Mutation " new alleles " New...
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