Selection Coefficient
Population Genetics
978-613-8-54727-3
6138547276
56
2011-12-14
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In population genetics, the selection coefficient is a measure of the relative fitness of a phenotype. Usually denoted by the letter s, it compares the fitness of a phenotype to another favored phenotype, and is the proportional amount that the considered phenotype is less fit as measured by fertile progeny. s=0 then is selectively neutral compared to the favored phenotype, while s=1 indicates complete lethality. For example, if the favored phenotype produces 100 fertile progeny, and only 90 are produced by the phenotype selected against then s = 0.1. An alternative way of expressing this is to describe the fitness of the favored phenotype as 1.0 and that of the phenotype selected against as 0.9. The terminology is used in the same way to refer to the selective differences between genotypes to which it extends in a natural fashion.
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