Biology letters 2006 female wing infection rate 30 08

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

This note was uploaded on 01/13/2014 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell.

Ask a homework question - tutors are online