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Scenario 2. Now pretend the predatory fish was not introduced. The population is 20,000 and freq(B) = 0.5. There are not observable differences in the survival or reproductive success of individuals that is related to their spots. A drought drastically reduces the size of the pond, and the population drops to 100 individuals. Twenty years after the drought, the frequency of B is 1.0. A. After the drought, the R allele was ( fixed / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? Explain your choice. a. Natural selection b. Genetic drift c. Gene Flow d. Mutation e. Non-random Mating C. What are two (2) different ways that the population could re-gain variation for this gene?

Scenario 2. Now pretend the predatory fish was not introduced. The population is 20,000 and freq(B) = 0.5. There are not observable differences in the survival or reproductive success of individuals that is related to their spots. A drought drastically reduces the size of the pond, and the population drops to 100 individuals. Twenty years after the drought, the frequency of B is 1.0. A. After the drought, the R allele was ( fixed / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? Explain your choice. a. Natural selection b. Genetic drift c. Gene Flow d. Mutation e. Non-random Mating C. What are two (2) different ways that the population could re-gain variation for this gene?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Answer part C using scenario 2

**Scenario 2:** Imagine the predatory fish was not introduced. The initial population consists of 20,000 individuals, with the frequency of allele B being 0.5. There are no observable differences in survival or reproductive success linked to individuals' spots. Following a drought, the pond size significantly decreases, leaving a population of only 100 individuals. Twenty years post-drought, the frequency of allele B becomes 1.0. A. After the drought, the R allele was ( **fixed** / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? **Explain your choice.** a. Natural selection b. Genetic drift c. Gene flow d. Mutation e. Non-random mating C. What are two (2) different ways that the population could regain variation for this gene?
Transcribed Image Text:**Scenario 2:** Imagine the predatory fish was not introduced. The initial population consists of 20,000 individuals, with the frequency of allele B being 0.5. There are no observable differences in survival or reproductive success linked to individuals' spots. Following a drought, the pond size significantly decreases, leaving a population of only 100 individuals. Twenty years post-drought, the frequency of allele B becomes 1.0. A. After the drought, the R allele was ( **fixed** / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? **Explain your choice.** a. Natural selection b. Genetic drift c. Gene flow d. Mutation e. Non-random mating C. What are two (2) different ways that the population could regain variation for this gene?
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