The introduction of the antibiotic methicillin was once successful in destroying Staphylococcus bacterial infections. More recently, strains of Staphylococcus bacteria have undergone mutations that cause the bacteria to be resistant to the action of methicillin, leading to increased incidence of the disease MRSA (methicillin-resistant Staphylococcus aureus).
The introduction of the antibiotic methicillin was once successful in destroying Staphylococcus bacterial infections. More recently, strains of Staphylococcus bacteria have undergone mutations that cause the bacteria to be resistant to the action of methicillin, leading to increased incidence of the disease MRSA (methicillin-resistant Staphylococcus aureus).
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter10: From Proteins To Phenotypes
Section: Chapter Questions
Problem 23QP
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The introduction of the antibiotic methicillin was once successful in destroying Staphylococcus bacterial infections. More recently, strains of Staphylococcus bacteria have undergone mutations that cause the bacteria to be resistant to the action of methicillin, leading to increased incidence of the disease MRSA (methicillin-resistant Staphylococcus aureus).
How would the proportion of bacteria carrying this mutation change in the population over time in populations treated with methicillin?
A. The number of mutated bacteria would increase because the mutated bacteria would outcompete the non-mutated bacteria for resources .
B. The number of mutated bacteria would decrease because the non-mutated bacteria would outcompete the mutated bacteria for resources.
C. The number of mutated bacteria would decrease because the non-mutated bacteria would be selected for over time through natural selection.
D. The number of mutated bacteria would increase because the mutated bacteria are more successful and are able to reproduce more bacteria with the same mutation.
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