EBK BIOLOGY
10th Edition
ISBN: 8220100474729
Author: Martin
Publisher: Cengage Learning US
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Chapter 19.3, Problem 2C
Why is mutation important to evolution if it is the microevolutionary force that generally has the smallest effect on allele frequencies?
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An hypothesis for the extinction of the dinosaurs is that the earth had been hit by a gigantic meteor that caused the death of those big reptiles. In that case the entire genetic pool of those animals has been destroyed, invalidating the Hardy-Weinberg equilibrium. In Genetics what is this type of gene frequency change called?
what is the meaning of fitness ?what two things do you suppose govern the
rate of evolution by natural selection?
a) Name and define the evolutionary processes that cause change in allele frequencies acrossgenerations.
b) Describe how each process is expected to change allele frequencies across generations,including the following terms as appropriate:- genome-wide effects, loci-specific effects
advantageous, deleterious, neutral- population size- speed of evolutionary change
Chapter 19 Solutions
EBK BIOLOGY
Ch. 19.1 - Define what is meant by a populations gene pool.Ch. 19.1 - Distinguish among genotype, phenotype, and allele...Ch. 19.1 - Prob. 1CCh. 19.1 - Can the frequencies of all genotypes in a...Ch. 19.1 - INTERPRET DATA In a human population of 1000, 840...Ch. 19.2 - Discuss the significance of the HardyWeinberg...Ch. 19.2 - Prob. 4LOCh. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA The genotype frequencies of a...
Ch. 19.3 - Prob. 5LOCh. 19.3 - Discuss how each of the following...Ch. 19.3 - Distinguish among stabilizing selection,...Ch. 19.3 - Which microevolutionary force leads to adaptive...Ch. 19.3 - Why is mutation important to evolution if it is...Ch. 19.3 - Which microevolutionary forces are most associated...Ch. 19.3 - Prob. 4CCh. 19.4 - Prob. 8LOCh. 19.4 - Prob. 1CCh. 19.4 - Prob. 2CCh. 19.4 - How can researchers test the hypothesis that...Ch. 19 - The genetic description of an individual is its...Ch. 19 - In a diploid species, each individual possesses...Ch. 19 - The MN blood group is of interest to population...Ch. 19 - If a populations allele and genotype frequencies...Ch. 19 - Prob. 5TYUCh. 19 - The continued presence of the allele that causes...Ch. 19 - According to the HardyWeinberg principle, (a)...Ch. 19 - Prob. 8TYUCh. 19 - Mutation (a) leads to adaptive evolutionary change...Ch. 19 - Which of the following is not true of natural...Ch. 19 - If all copies of a given locus have the same...Ch. 19 - Prob. 12TYUCh. 19 - EVOLUTION LINK Given that mutations are almost...Ch. 19 - Prob. 14TYUCh. 19 - Prob. 15TYUCh. 19 - EVOLUTION LINK Evolution is sometimes...Ch. 19 - INTERPRET DATA The recessive allele that causes...Ch. 19 - PREDICT You study males in populations of a...Ch. 19 - Prob. 19TYU
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- NASA is planning on sending a colony of Snow Monkeys to mars to determine how evolution will progress outside of our planet. They have calculated the following for 226 individuals: Observed Genotype Frequencies (not in HWE) AA: 0.392 Aa: 0.445 aa: 0,163 If this population was in Hardy Weinberg Equilibrium, what would be the expected number of individuals for the homozygous recessive? Retain 1 decimal place.arrow_forwardYou are studying two genetic loci that are on the same chromosome. One of the loci is a gene that produces darker feathers in dark environments in birds. The second locus is a gene associated with metabolism. In your research you find that the second locus is not under selection, but the first locus is undergoing positive selection. The positive selection at the first locus is increasing a specific allele at the second locus. This discovery of yours is best described as which of the following? a. Recombinaton b. Linkage equilibrium c. Genetic hitchhiking d. Chromosome inversionarrow_forwardWhy is population level genetic variation important for evolution and what causes genetic variation ? How do we detect if evolution is occurring ?arrow_forward
- Why do traits have to be heritable in order for evolution by natural selection to occur?arrow_forwardWhat is the role of variation in evolution?arrow_forwardSuppose that a population is at equilibrium between mutation and selection for a deleterious recessive allele, where s = 0.5 and μ = 10−5. What is the equilibrium frequency of the allele? What is the selection cost?arrow_forward
- What is the long term and short term effects of natural selection on coding and non-coding DNA, the amount of transposable elements and birth and death of genes? And how does it exert the effect?arrow_forwardWhich of the following are supported explanations for the evolution of complex traits? A) incremental changes each providing a benefit B) a trait origiannly selected for a specfic function adopts a new function as a consequence of selectionarrow_forwardA) Explain why it is almost always the case that there is not a one to one correspondence between a single gene and an observable trait in an organism. B) Does natural selection act more directly on traits or genes?arrow_forward
- What is the 50-500 rule? What does each of these numbers represent? With what mechanism of evolutionary change (of the five Hardy-Weinberg assumptions) does this rule primarily deal? What other major field of study uses this rule and why?arrow_forwardHow to determine whether mutation is a significant forcein changing allele frequencies ?arrow_forwardThe dog breed West Highland Terrier is a product of artificial selection. Give a brief description of the breed and its desired traits. What wild ancestor did it come from? Was it produced with selective breeding or genetic engineering (i.e. genetically modified)? What are the benefits of artificial selection in this case? Are there potential negative consequences?arrow_forward
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