Foundations in Microbiology
10th Edition
ISBN: 9781259705212
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 21.L2, Problem 9CT
a. In what way is the oral cavity an ecological system?
b. What can cause an imbalance in the oral ecology?
c. Explain how it is possible for the gingiva and tooth surface to provide an anaerobic habitat.
d. What arc some logical ways to prevent dental disease besides removing plaque?
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
Chapter 21 Solutions
Foundations in Microbiology
Ch. 21.1 - Differentiate among the different stages of...Ch. 21.1 - Prob. 2ELOCh. 21.1 - List the nonsyphilitic treponematoses.Ch. 21.1 - Prob. 4ELOCh. 21.1 - Identify the vectors and behaviors associated with...Ch. 21.1 - Construct a table comparing the symptoms of...Ch. 21.1 - Prob. 2CYPCh. 21.1 - Besides syphilis, what other diseases are caused...Ch. 21.1 - List several behaviors that would put one at risk...Ch. 21.2 - Relate the physical characteristics seen in the...
Ch. 21.2 - Understand the pathogenesis of cholera.Ch. 21.2 - Name the usual source of infection for each genus...Ch. 21.2 - Prob. 9ELOCh. 21.2 - How could one differentiate the genera Vibrio,...Ch. 21.2 - Prob. 6CYPCh. 21.2 - Which two species of curviform bacteria are...Ch. 21.2 - Briefly describe the nature of food infection in...Ch. 21.2 - Prob. 9CYPCh. 21.3 - Prob. 10ELOCh. 21.3 - Understand the epidemiology and pathology of Rocky...Ch. 21.3 - Prob. 12ELOCh. 21.3 - Prob. 13ELOCh. 21.3 - Prob. 14ELOCh. 21.3 - Recall the names and characteristics of diseases...Ch. 21.3 - What do rickettsias and chlamydias derive from the...Ch. 21.3 - Provide an example of a species, vector, and...Ch. 21.3 - Prob. 12CYPCh. 21.3 - Prob. 13CYPCh. 21.3 - Prob. 14CYPCh. 21.3 - Prob. 15CYPCh. 21.3 - Prob. 16CYPCh. 21.3 - Prob. 17CYPCh. 21.4 - Describe the characteristics and diseases of...Ch. 21.4 - Describe how L forms may arise.Ch. 21.4 - Prob. 18CYPCh. 21.4 - Prob. 19CYPCh. 21.4 - Which body systems are affected by mycoplasma...Ch. 21.4 - Explain why penicillin therapy may result in the...Ch. 21.5 - Discuss the formation of plaque on tooth surfaces.Ch. 21.5 - Relate the formation of plaque to periodontitis.Ch. 21.5 - Prob. 22CYPCh. 21.5 - Prob. 23CYPCh. 21.5 - Prob. 24CYPCh. 21.5 - Prob. 25CYPCh. 21.L1 - Prob. 1MCQCh. 21.L1 - Prob. 2MCQCh. 21.L1 - Prob. 3MCQCh. 21.L1 - Prob. 4MCQCh. 21.L1 - Prob. 5MCQCh. 21.L1 - Prob. 6MCQCh. 21.L1 - Relapsing fever is spread by a. lice b. ticks c....Ch. 21.L1 - Prob. 8MCQCh. 21.L1 - Prob. 9MCQCh. 21.L1 - Prob. 10MCQCh. 21.L1 - Prob. 11MCQCh. 21.L1 - Prob. 12MCQCh. 21.L1 - Prob. 13MCQCh. 21.L1 - Prob. 14MCQCh. 21.L1 - Mycoplasmas attack the ____ of host cells. a....Ch. 21.L1 - Prob. 16MCQCh. 21.L1 - Prob. 17MCQCh. 21.L1 - Prob. 18MCQCh. 21.L1 - Prob. 19MCQCh. 21.L1 - Prob. 20MCQCh. 21.L1 - Prob. 1CSRCh. 21.L1 - What other risk factors could have alerted...Ch. 21.L1 - What characteristics of Coxiella are important...Ch. 21.L1 - Prob. 1WCCh. 21.L1 - Prob. 2WCCh. 21.L1 - a. In what ways are dental diseases mixed...Ch. 21.L1 - a. Which diseases in this chapter are zoonoses? b....Ch. 21.L2 - a. Why does syphilis have such profound effects on...Ch. 21.L2 - a. In view of the fact that cholera causes the...Ch. 21.L2 - Prob. 3CTCh. 21.L2 - Prob. 4CTCh. 21.L2 - Prob. 5CTCh. 21.L2 - Prob. 6CTCh. 21.L2 - Prob. 7CTCh. 21.L2 - Which two infectious agents covered in this...Ch. 21.L2 - a. In what way is the oral cavity an ecological...Ch. 21.L2 - Prob. 10CTCh. 21.L2 - Prob. 11CTCh. 21.L2 - Prob. 12CTCh. 21.L2 - Prob. 1VC
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