BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 19, Problem 19CTQ
Describe a situation in which a population would undergo the bottleneck effect and explain what impact that would have on the population’s gene pool.
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Chapter 19 Solutions
BIOLOGY 2E
Ch. 19 - Figure 19.2 In plants, violet flower color (V) is...Ch. 19 - Figure 19.4 Do you think genetic drift would...Ch. 19 - Figure 19.8 In recent years, factories have become...Ch. 19 - What is the difference between micro- and...Ch. 19 - Population genetics is the study of: how selective...Ch. 19 - Which of the following populations is not in...Ch. 19 - One of the original Amish colonies rose from a...Ch. 19 - When male lions reach sexual maturity, they leave...Ch. 19 - Which of the following evolutionary forces can...Ch. 19 - What is assortative mating? when individuals mate...
Ch. 19 - When closely related individuals mate with each...Ch. 19 - What is a cline? the slope of a mountain where a...Ch. 19 - Which type of selection results in greater genetic...Ch. 19 - When males and females of a population look or act...Ch. 19 - The good genes hypothesis is a theory that...Ch. 19 - Solve for the genetic structure of a population...Ch. 19 - Explain the Hardy-Weinberg principle of...Ch. 19 - Imagine you are trying to test whether a...Ch. 19 - Describe a situation in which a population would...Ch. 19 - Describe natural selection and give an example of...Ch. 19 - Explain what a cline is and provide examples.Ch. 19 - Give an example of a trait that may have evolved...Ch. 19 - List the ways in which evolution can affect...
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- explain how the population would respond in the following scenarios. a. The snowy owls' environment has been warming slowly over the last 70 years. The forests do not stay as snow-covered throughout the year. The owls have a harder time hiding from their prey for a few months out of the year. There is a mutation that allows the owls' feathers to change to brown during the warmer months. c. The snowy owls' environment is warming up very quickly and going from very frigid temperatures to very warm. This change is happening so quickly that the snowy owls are too visible to their prey since there is less snow. They have started having a hard time finding food and many are starving. The warmth has also messed up their migration/breeding patterns.arrow_forwardA population is solely comprised of 120 A2A2 individuals. 18 A1A1 individuals migrate in and contribute to the mating pool. What is the frequency of A1A2 individuals in the offspring? Answer to 2 decimal places. Hint: Use the Gene Flow table!arrow_forwardThe graph below includes information on the average time to fixation of an allele (in generations) as a function of population size. The three different curves represent different starting allele frequencies. Which of the following statements correctly describes patterns depicted in the graph below? I. As population size increases, it takes fewer generations for alleles to reach fixation II. As starting allele frequency increases, it takes fewer generations for alleles to reach fixation III. Small populations will lose alleles more rapidly than large populations. IV. Even if starting allele frequency is low, fixation is possible - it just happens slowly. Only III is a correct description Only II is a correct description II, III, & IV are correct descriptions Both II & III are correct descriptions Both I & II are correct descriptions All four statements (I, II, III & IV) are correct descriptions asap pleasearrow_forward
- Explain why a harmful allele can persist at high frequency ina population.arrow_forwardA large conservation agency in Austria is interested in the status of the endangered newt species, Triturus austriacus, and wants you to estimate population sizes. Describe at least two methods based on genetic markers such as microsatellites which could be used to estimate effective population size (NE). Compare their relative advantages and disadvantages.arrow_forwardThe Mauritius kestrel is found on the island of Mauritius in the Indian Ocean. In 1974, the population went through a bottleneck of one male and one female. The population had fewer than 10 birds throughout the 1970s and did not increase in size until the 1990s. Assume that the population size was 5 birds for 4 generations and estimate what proportion of the original heterozygosity remained in the population after the bottleneck. Report your answer as a proportion to the nearest 0.001. Type your answer... DDarrow_forward
- Describe a population that is exhibiting rapid evolutionary change.arrow_forwardDoes having a dominant allele mean that it will be found in greater frequency in the population? Explainarrow_forwardPredict how having a larger vs smaller population size or a larger vs smaller mutation rate will influence the maintenance of variation in populations when drift and mutation are both present.arrow_forward
- What effect does such a bottleneck have on the future population? Give a brief description of its effect on the size, ability to reproduce, and genetic diversity.arrow_forwardA population of a snake species with three skin color variations inhabited a deciduous forest in southern chile. In 2000, many trees in the forest were cut down for timber. The number of snakes of each color was monitored for the next 10 years. The results if this study are recorded in the graph below. Describe how variation affects the survival of this snake species in new environmental conditions?arrow_forwardThe data chart below shows the number of black and tan mice in a population in a field over five generations. Which of the following is the most likely explanation of the findings? Question options: A natural disaster occurred during the second generation causing a reduction in the number of black mice and a bottleneck population of tan mice was left to reproduce. A random genetic mutation occurred in a black mouse in generation three, leading to a decline in the population. The predator of the mice hunts during the day when the tan mice are better camouflaged in the environment so the black mice were eaten more frequently. The tan mice were able to acquire the ability to adapt to the environment quickly between the first and second generation.arrow_forward
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