Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 23.1, Problem 2CC

Ot all the mutations that occur in a population, why do only a small fraction become widespread?

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. In a population of 50,000 diploid individuals, what isthe probability that a new neutral mutation will ultimately reach fixation? What is the probability that itwill ultimately be lost from the population?
Consider the following estimates:(a) There are 7 x 109 humans living on this planet.(b) Each individual has about 20,000 (0.2 * 105) genes.(c) The average mutation rate at each locus is 10-5.How many spontaneous mutations are currently present inthe human population? Assuming that these mutations areequally distributed among all genes, how many new mutationshave arisen in each gene in the human population?
In most cases, the rate of synonymous substitution for a gene is higherthan the rate of nonsynonymous substitution. Sometimes, however, therate of nonsynonymous substitution is higher. When would you expectto see this? What might bring it about?
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY