Our Origins: Discovering Physical Anthropology (Fourth Edition)
4th Edition
ISBN: 9780393614008
Author: Clark Spencer Larsen
Publisher: W. W. Norton & Company
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Chapter 4, Problem 5ER
Summary Introduction
To provide: At least one example for nonhuman population and modern human population in which genetic drift may be an especially important factor affecting evolution and variation.
Introduction: The evolution is the process by which the heritable characteristics of an organism changes over successive generations. The variation is defined as any difference between cells, groups of organisms, or individual organisms of species. It is caused either by the effect of the environmental factors on the expression of the genetic potentials or genetic differences.
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Fitness is, most correctly, a technical term. What does it mean? What two things do you suppose govern the rate of evolution by natural selection? Explain how Darwinian evolution can decrease and increase the frequency of an allele (or a more complex heritable trait, for that matter). Write it in an essay form
You are asked to assess whether a population of endangered salamanders can adapt to warming climate in their preferred habitat. The salamanders vary at a locus that determines adaptation to temperature, and the warming climate creates selection favoring one of two alleles at that locus. Drawing on what you know about natural selection and genetic drift, what information would you need to know about the salamanders to determine whether the allele that improves their adaptation to warmer climates will become fixed in the population?
Strictly no plagiarism.
Evolution is a change in frequencies of alleles in the gene pool of a population. This definition of evolution was developed a result of the work in the 20th century by Hardy and Weinberg. Through mathematical modeling based on probability, they concluded that allele and genotype frequencies in a population will remain constant from generation to generation absence of evolutionary influences. Evolution will not occur in a population if seven conditions are met:
1. mutation is not occurring
2. natural selection is not occurring
3. the population is infinitely large
4. all members of the population breed
5. mating is totally random
6. everyone produces the same number of offspring
7. there is migration in or out of the population
One of the criteria in the prompt above has been mis-typed. Correct the erroneous phrase so evolution will NOT occur.A) (5) There is sexual selection.B) (1) Mutation occurs within the population.C) (4) The fittest members of the population breed.D) (7)…
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Our Origins: Discovering Physical Anthropology (Fourth Edition)
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- Fitness is most correctly a technical term what does it mean what two things do you suppose govern the rate of evaluation by natural selection explain how Darwinian evolution can decrease and increase the frequency of any allelearrow_forwardWhat is the role of variations in a evolution _if heterozygosity is reduced,what happens to the potential for evolution?the phenotype and genotype of a population is due to a mosaic of random and directed process.some of these have to do with history,some are related to adaptation etc.As completely as possible , discuss the role of chance and direction in evolution and in determining the phenotype of a populationarrow_forwardBook: Greatest Show on Earth Answer both question below. Explain what Dawkins says selection is acting on in chapter 2 and how that variation is distributed throughout a population (gene pool) (blending vs. independent assortment). -150 word minimum In chapter 3, Dawkins suggests that selection is powerful yet unconscious of its actions ("without any understanding at all"). He uses a variety of examples to highlight how various organisms drive selection, sometimes consciously and sometimes unconsciously, by mediating the breeding process. Using one of the examples explain how some organisms unconsciously drive the selection of others. -150 word minimumarrow_forward
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