
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Imagine that you are asked to manage a population of wolves that have taken up
residence on an island off the coast of Alaska. Because prey
island will support only about 50 wolves at any one time. What steps would you take to
prevent inbreeding and genetic drift in the population in the future?
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- Several generations of population X have been studied. The dominant allele frequency for the second generation of population X was calculated to be 0.27. The tenth generation for population X has been collected and the dominant allele frequency is 0.73. Is population X evolving? Explain your answer(s).arrow_forwardIn the Galapagos islands lives a species of penguin that exists nowhere else on the planet. This species began when some penguins from the south got caught in an ocean current that deposited them at the Galapagos islands thousands of years ago. This species of penguin has a high amount of inbreeding as denoted by a high inbreeding coefficient (F). What is most likely the cause of such high values for F in this species? 1.Natural selection is very strong in small populations and is removing genetic diversity from the penguin populations. 2.The founder effect is at play. Since the population was so small to begin with, genetic variation is low and inbreeding is high.arrow_forwardSuppose you have four species of lizard and you are interested in how leg length will change in a single generation of evolution under directional selection. Given the following parameters, which lizard do you predict will change the most in one generation? Species A: Heritability: 0.5, selection differential: 1.2 Species B: Heritability: 0.4, selection differential: -1.9 Species C: Heritability: 0.9, selection differential: -0.67 Species D: Heritability: 0.1, selection differential 3.2 Species A Species B Species C Species Darrow_forward
- After some time, individuals begin to migrate between islands 2 and 3, but the overall population size remains at 40 individuals on each island. On island 3, you would expect that the red allele frequency will decrease, but the yellow and blue allele frequencies will increase over time. Select one: O True O False After many generations, you return and sample individuals from the mainland coastal region and island 2, and you discover that the same mutation, a green allele, has appeared in both populations. It is present in five individuals in the mainland population and in five individuals in the population from island 2. True or False? Mutation is a stronger evolutionary mechanism in the large mainland population than in the small island population. Select one: O True O Falsearrow_forwardThe following table provides phenotypic data for a population of mammoths living in cold environments based on fossil and DNA evidence. Based on this data and your knowledge of natural selection, which explanation best explains the trends seen in the data? Individuals with thicker fur had a survival advantage in the cold environment, allowing these individuals to reproduce more often and create more offspring. Individuals within this population of mammoths tend to only mate with individuals that have thick fur. This population of mammoths appear to be in Hardy-Weinberg equilibrium since no allele frequencies are changing over time. Individuals with thick fur migrated into the population of mammoths, increasing the proportion of these individuals.arrow_forwardFrom the same fishing village in Alaska, where the allele frequency of webbed feet is 0.15, selection seems like a drastic step to increase the number of webbed footed individuals. Instead, the village examines how inbreeding would affect the population. If first cousins were allowed to mate, how frequently would webbed footed individuals be observed? (Remember this is a dominant trait!)arrow_forward
- Two populations of snails live on opposite sides of a city. The frequency of the recessive allele (q) of a trait is 0.1 in the population on the south side of the city and 0.6 in the population on the north side. Some individuals from the north side are moved to the south side. After migration, 35% of the individuals on the south side are migrants (originally from the north side). Determine how this migration event affected q in the south side population. Round to the nearest thousandth. Express all values as a frequency in the format “0.###” What is the value of m? What is q in the south side population after migration (aka, q’)?arrow_forwardCould you please answer part 3 and 4arrow_forwardCana a change in the physical enviroment of a population result in evolution by natural slection?(hint: remember the peppered moth's camouflage and color changes of tree bark due to pollution)arrow_forward
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