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Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 43.1, Problem 3CC
WHAT IF? Imagine two populations of a fish species, one in the Mediterranean Sea and one in the Caribbean Sea. Now imagine two scenarios: (1) The populations breed separately, and (2) adults of both populations migrate yearly to the North Atlantic to interbreed. Which scenario would result in a greater loss of genetic diversity if the Mediterranean population were harvested to extinction? Explain your answer.
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Try to outline a scenario explaining the evolution of the three species shown in panel g. Use migration, mutation, genetic drift, selection, reproductive isolation, gene flow, extinction, and many generations in your scenario. Based on your scenario, what are the components that are necessary in a population in order for it to split or diverge into two new daughter species from a single ancestor (the parent species)?
WHAT IF? Imagine two populations of a fish species,one in the Mediterranean Sea and one in the CaribbeanSea. Now imagine two scenarios: (1) The populationsbreed separately, and (2) adults of both populationsmigrate yearly to the North Atlantic to interbreed. Whichscenario would result in a greater loss of genetic diversityif the Mediterranean population were harvestedto extinction? Explain your answer.
The Tibetans and Han Chinese share several genetic traits and DNA. However, the EPAS1 gene, which increases the ability of red blood cells to carry oxygen even in low oxygen environments, is only commonly found in the Tibetan population that live in higher elevations. Explain why this gene is only common in Tibetan populations from the perspective of competitive advantage and natural selection. Write your answer in three to five sentences
Chapter 43 Solutions
Campbell Biology In Focus
Ch. 43.1 - Prob. 1CCCh. 43.1 - Prob. 2CCCh. 43.1 - WHAT IF? Imagine two populations of a fish...Ch. 43.2 - How does the reduced genetic diversity of small...Ch. 43.2 - Prob. 2CCCh. 43.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 43.3 - Prob. 1CCCh. 43.3 - Prob. 2CCCh. 43.3 - Prob. 3CCCh. 43.4 - How can the addition of excess mineral nutrients...
Ch. 43.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 43.5 - Prob. 1CCCh. 43.5 - Prob. 2CCCh. 43.6 - Prob. 1CCCh. 43.6 - Prob. 2CCCh. 43.6 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 43 - One characteristic that distinguishes a population...Ch. 43 - Prob. 2TYUCh. 43 - Prob. 3TYUCh. 43 - Prob. 4TYUCh. 43 - Prob. 5TYUCh. 43 - Prob. 6TYUCh. 43 - DRAW IT (a) Estimate the average CO2 concentration...Ch. 43 - Prob. 8TYUCh. 43 - FOCUS ON EVOLUTION The fossil record indicates...Ch. 43 - Prob. 10TYUCh. 43 - SYNTHESIZE YOUR KNOWLEDGE Big cats, such as the...
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- Scenario 1In the 1960s, a population of squirrels (Sciurus carolensis) was being studied in Alabama and the coat color of the squirrels was found to range from the more common gray color (dominant) to the less common red color (recessive). When they sampled an area, they found 536 gray squirrels and 64 red squirrels. Assume that the population is at Hardy-Weinberg equilibrium. 2A. Show your work to find the frequency of the dominant allele.arrow_forwardThe Tibetans and Han Chinese share several genetic traits and DNA. However, the EPAS1 gene, which increases the ability of red blood cells to carry oxygen even in low oxygen environments, is only commonly found in the Tibetan population that live in higher elevations. Why this gene is only common in Tibetan populations from the perspective of competitive advantage and natural selection.arrow_forwardScenario 1In the 1960s, a population of squirrels (Sciurus carolensis) was being studied in Alabama and the coat color of the squirrels was found to range from the more common gray color (dominant) to the less common red color (recessive). When they sampled an area, they found 536 gray squirrels and 64 red squirrels. Assume that the population is at Hardy-Weinberg equilibrium. 3B. How many squirrels are heterozygous?(Put your answer here rounded to the nearest whole number)arrow_forward
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