Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 13, Problem 8SQ
Summary Introduction
To explain: How bottleneck effect and founder effect lead to genetic drift.
Introduction: Genetic drift represents the change in the gene pool of a population occurred by chance. The changes in the gene pool occur due to mutation in the genetic material. The variations in the genetic material are the main cause of evolutionary changes occurring in a population. Variation helps a population to gain an advantage over other populations.
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Relate the process of genetic drift to genetic bottlenecks and the founder effect, using examples.
What is happening at the bottleneck? Describe the effect of genetic drift during the bottleneck.
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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Campbell Essential Biology with Physiology (6th Edition)
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- Explain how population size affects genetic drift, and calculate the probabilities of the outcomes of such drift.arrow_forwardWhat type of event could cause each type of genetic drift (founder effect and bottleneck effect)?arrow_forwardThe founder effect is a type of (genetic drift / gene flow) in which individuals in one small group of a large population (establish a new distant population / are the only survivors) and then reproduce.arrow_forward
- Give typed explanation not written How can we measure gene flow between discrete populations? a. By estimating the proportion of individuals in the populations that are immigrants. b. By estimating the migration variance (σm2). c. By counting the number of offspring each individual has. d. By counting the number of connected populations.arrow_forwardExplain why genetic drift is more powerful in small populationsarrow_forwardCite instances in the natural setting where the phenomenon of genetic driftarrow_forward
- Compare and contrast allopatric and sympatric speciation, and discuss why one is more common than the other.arrow_forwardExplain in 3 or 2 paragraphs -Genetic drift vs Gene flowarrow_forwardThe bottleneck effect and the founder effect are two processes that cause genetic drift to occur. Which was modeled in the second part of this activity? How do you know?arrow_forward
- Based on the figure, what is the effect of random genetic drift on thegene and genotypic frequencies of the population? Describe the trend and provide a briefexplanation.arrow_forwardUnder genetic drift, if an allele’s frequency is 1%, what is the likelihood that it will be lost from the population? part B; Construct a graph that describes the likelihood of fixation of a particular allele, for a small population that is under Wright-Fisher genetic drift. Don’t forget to label axes completely.arrow_forwarda. What effect does combining genetic drift and natural selection have on beneficial mutations? b. How would you it change if population size increasesarrow_forward
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