Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 23, Problem 10R
Summary Introduction
To review:
The asymptomatic infection during pregnancy which can result in deafness and mental retardation in the newborn.
Introduction:
Cytomegalovirus (CMV) is a large herpes virus that causes infections of white blood cells. It stays as a latent infection with slow replication and produces an inclusion of bodies within cells. If the virus is transmitted vertically to the fetus, it results in hearing loss and mental retardation in neonates.
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In a natural population of outbreeding plants, the variance of the total number
of seeds per plant is 16. From the natural population, 20 plants are taken into
the laboratory and developed into separate true-breeding lines by self-
fertilization-with selection for high, low, or medium number of seeds-for 10
generations. The average variance in the tenth generation in each of the 20 sets
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heritability for seed number in this population. (4 pts)
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Question 1
In a population of Jackalopes (pictured below), horn length will vary between
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be the optimal length for battling other Jackalopes for food. After a round of
breeding, you measure the offsprings' mean horn length is 1.67. What is the
heritability of horns length (h2)? Is Jackalope horn length a heritable trait? (4
pts)?
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Frequency of
allele A1
Question 2
The graph below shows results of two simulations, both depicting the rise in
frequency of beneficial allele in a population of infinite size. The selection
coefficient and the starting frequency are the same, but in one simulation the
beneficial allele is dominant and in the other it is recessive. Neither allele is
fixed by 500 generations.
1.0
1
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(a) Which simulation shows results for a dominant and which shows results for a
recessive allele? How can you tell? (4 pts)
(b) Neither of the alleles reaches fixation by 500 generations. If given enough
time, will both of these alleles reach fixation in the population? Why or why
not? (3 pts)
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Chapter 23 Solutions
Microbiology: An Introduction
Ch. 23 - Identify the portals of entry for Trypanosoma...Ch. 23 - Prob. 2RCh. 23 - Prob. 3RCh. 23 - Complete the following table.Ch. 23 - Complete the following table.Ch. 23 - Prob. 6RCh. 23 - Compare and contrast cat-scratch disease and...Ch. 23 - Prob. 8RCh. 23 - Prob. 9RCh. 23 - Prob. 10R
Ch. 23 - Use the following choices to answer questions 1...Ch. 23 - Prob. 2MCQCh. 23 - Prob. 3MCQCh. 23 - Prob. 4MCQCh. 23 - Prob. 5MCQCh. 23 - Which of the following is not a tickborne disease?...Ch. 23 - Prob. 7MCQCh. 23 - Prob. 8MCQCh. 23 - Prob. 9MCQCh. 23 - Prob. 10MCQCh. 23 - Prob. 1ACh. 23 - What is the most effective way to control malaria...Ch. 23 - Prob. 3ACh. 23 - The hunter picked up the front paws for good luck....Ch. 23 - Prob. 2CAECh. 23 - Prob. 3CAECh. 23 - Prob. 4CAECh. 23 - A 67-year-old man worked in a textile mill that...
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