Ch6 Evolution and Adaptation2.pdf

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Department
University College Courses
Course
UNI101Y1
Professor
Spencer Barrett
Semester
Winter

Description
BIO120H © Li| Page 2011 Stabilizing, Directional, and Disruptive Selection  sstabilizing selection differential survival or reproduction of individuals with a phenotype at one extreme of the population distribution, resulting in an evolutionary shift in the population average toward that phenotype  ddirectional selection differential survival or reproduction of individuals with phenotypes at two or more extremes, resulting in an evolutionary shift of individual phenotypes away from the population average  ddisruptive selection differential survival or reproduction of individuals with phenotypes closest to the average value of a population EVOLUTIONARY CHANGES IN ALLELE FREQUENCIES HAVE BEEN DOCUMENTED IN NATURAL POPULATIONS  Selection and Change in the Frequency of Melanistic Moths  iindustrial melanism the evolution of dark coloration by cryptic organisms in response to industrial pollution, especially by soot, in their environments Population Genetics and the Prediction of Evolutionary Change  ppopulation genetics the study of changes in the frequencies of genes and genotypes within a population INDIVIDUALS CAN RESPOND TO THEIR ENVIRONMENTS AND INCREASE THEIR FITNESS  pphenotypic plasticity the genetically based capacity
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