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)
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 of an allele (or a more heritable traits,for that matter )
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 darwanian evolution can decrease and increase the frequency of an allele.
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Our Origins: Discovering Physical Anthropology (Fourth Edition)
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- Fitness is mostly 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)arrow_forwardWhat is the role of variation in 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 processe.some of these have to do with history; some are related to adaptation, etc. As completely as possibl, discuss the role of chance and direction in evolution and in determining the phenotype of a population.arrow_forwardAccording to the Hardy-Weinberg Equilibrium Equation, all of the following slow down or stop evolution EXCEPT (choose as many as apply): Group of answer choices very small population very large population no one leaves or comes into the population everyone has equal numbers of offspring there are no mutations there are lots of mutations there is non- random matingarrow_forward
- 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)…arrow_forwardFitness is, most correctly, a technical term.What does it mean? What two things do u 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).arrow_forwardGraph 2: Draw the predictions of a population genetics model when the starting allele frequency of the A1 allele is 0.2, individuals that are homozygous for the A1 allele have a 5% increase in fitness, and otherwise all assumptions of the Hardy Weinberg model are true. 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0arrow_forward
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