Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780134153742
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 16, Problem 3RQ
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How does population size affect the likelihood of changes in allele frequencies by chance alone? Can significant changes in allele frequencies (that is, evolution) occur as a result of genetic drift?
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What Causes Allele Frequencies to Change in Real Populations?
Chapter 16 Solutions
Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 16 - The alleles responsible for antibiotic resistance...Ch. 16 - Stabilizing selection on a trait tends to a. make...Ch. 16 - An adaptation is any trait that arises from a...Ch. 16 - 4. Which of the following statements about...Ch. 16 - 5. Genetic drift occurs
a. when different...Ch. 16 - The ________ provides a simple mathematical model...Ch. 16 - 2. Different versions of the same gene are called...Ch. 16 - An organism's ________ refers to the specific...Ch. 16 - 4. A random form of evolution is called _________....Ch. 16 - Competition is most intense between members of...
Ch. 16 - 6. The evolutionary fitness of an organism is...Ch. 16 - 1. What is a gene pool? How would you determine...Ch. 16 - 2. Define equilibrium population. Outline the...Ch. 16 - How does population size affect the likelihood of...Ch. 16 - If you measured the allele frequencies of a gene...Ch. 16 - 5. People like to say that “you can’t prove a...Ch. 16 - 6. Describe the three ways in which natural...Ch. 16 - What is sexual selection? How is sexual selection...Ch. 16 - In North America, the average height of adult...Ch. 16 - By the 1940s, the whooping crane population had...
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- How Can We Measure Allele Frequencies in Populations? The MN blood group is a single-gene, two-allele system in which each allele is codominant. Why are such codominant alleles ideal for studies of allele frequencies in a population?arrow_forwardHow Can We Measure Allele Frequencies in Populations? Drawing on your newly acquired understanding of the HardyWeinberg equilibrium law, point out why the following statement is erroneous: Because most of the people in Sweden have blond hair and blue eyes, the genes for blond hair and blue eyes must be dominant in that population.arrow_forwardHow Can We Measure Allele Frequencies in Populations? What are four assumptions of the HardyWeinberg law?arrow_forward
- Can changes in allele frequencies cause genetic drift and is genetic drift always random ?arrow_forwardUnder what scenaries is genetic drift most potent as an evolutionary process? how do factors like population size and initial allele frequences affect likelihood of an allele being lost from a population (or becoming fixed)?arrow_forwardDoes inbreeding affect allele frequencies? Why or why not? How does it affect genotype frequencies? With regard to rare recessive diseases, what are the consequences of inbreeding in human populations?arrow_forward
- How does population size affect genetic drift?arrow_forwardThere are 150 dominant homozygotes, 100 heterozygotes, and 50 recessive homozygotes in a population. How many dominant and how many recessive alleles are in this population? What would be there respective allele frequencies?arrow_forwardWhy is population level genetic variation important for evolution and what causes genetic variation ? How do we detect if evolution is occurring ?arrow_forward
- There are 100 dominant homozygotes, 100 heterozygotes, and 100 recessive homozygotes in a population. How many dominant alleles and how many recessive alleles are in this population? What would be their respective allele frequencies?arrow_forwardWhat is the Evidence That Populations Evolve by Natural Selection?arrow_forwardWhen two populations frequently intermix due to migration, what are the long-term consequences with regard to allele frequencies and genetic variation?arrow_forward
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