Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 16.2, Problem 1CSC
Evolution of a Menace
The mutant alleles that confer antibiotic resistance on members of a bacterial population can move to other populations by gene flow and increase by genetic drift. For example. MRSA living on a person's skin might be transferred to her roommate's skin via a shared towel or article of clothing. After joining the population of nonresistant bacteria on the roommate's skin, the newly arrived MRSA may reproduce and may even transfer resistance alleles directly to local bacteria through a process known as conjugation (see Chapter 20). The resistance alleles, introduced to the bacterial population on the roommate's skin by gene flow, may subsequently experience genetic drift that increases their frequency. But what will happen if antibiotics are introduced to the new environment (that is. the roommate's body)? Find out in Section 16.3.
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Chapter 16 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 16.1 - define evolution in terms of concepts from...Ch. 16.1 - define equilibrium population and describe the...Ch. 16.2 - Evolution of a Menace The mutant alleles that...Ch. 16.2 - describe how mutation, gene flow, genetic drift,...Ch. 16.2 - A flu vaccination stimulates your immune system to...Ch. 16.2 - If it were true that mutations do occur in...Ch. 16.2 - Explain how the distribution of genotypes in...Ch. 16.2 - If a population grows large again after a...Ch. 16.2 - Prob. 4TCCh. 16.3 - describe why selection of phenotypes can affect...
Ch. 16.3 - A team of phys clans treated four patients with...Ch. 16.3 - If we studied a population of bighorn sheep and...Ch. 16.3 - explain how competition and predation influence...Ch. 16.3 - When selection is directional, is there any limit...Ch. 16.3 - Prob. 3CYLCh. 16.3 - Microbiologists have discovered that alleles...Ch. 16.3 - compare and contrast directional selection,...Ch. 16 - In North America, the average height of adult...Ch. 16 - The ______ provides a simple mathematical model...Ch. 16 - The alleles responsible for antibiotic resistance...Ch. 16 - What is a gene pool? How would you determine the...Ch. 16 - By the 1940s, the whooping crane population had...Ch. 16 - Different versions of the same gene are called...Ch. 16 - Stabilizing selection on a trait tends to a. make...Ch. 16 - Define equilibrium population. Outline the...Ch. 16 - An organisms ______ refers to the specific alleles...Ch. 16 - An adaptation is a. any trait that arises from a...Ch. 16 - How does population size affect the likelihood of...Ch. 16 - A random form of evolution is called ________....Ch. 16 - Which of the following statements about mutations...Ch. 16 - If you measured the allele frequencies of a gene...Ch. 16 - Competition is most Intense between members of...Ch. 16 - Genetic drift occurs a. when different phenotypes...Ch. 16 - People like to say that you cant prove a negative....Ch. 16 - The evolutionary fitness of an organism is...Ch. 16 - Describe the three ways in which natural selection...Ch. 16 - What is sexual selection? How is sexual selection...
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