Microbiology: A Systems Approach
4th Edition
ISBN: 9780073402437
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 21.3, Problem 4AYP
Summary Introduction
To enlist:
Possible causative agents, modes of transmission, virulence factors, diagnostic techniques, and prevention and treatment of upper respiratory tract infections like common cold, sinusitis, otitis media, pharyngitis and diphtheria.
Concept introduction:
Diseases are caused due to the growth of various microorganisms inside the human body. They grow in the respiratory tract, nasal tract and alveoli of the lungs. Infection is caused by various strains of bacteria and viruses which penetrate the immune system of the host and proliferate with production of toxins inside the infected cells.
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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW). If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?
None
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…
Chapter 21 Solutions
Microbiology: A Systems Approach
Ch. 21.1 - Prob. 1AYPCh. 21.1 - Prob. 2AYPCh. 21.2 - Prob. 3AYPCh. 21.3 - Prob. 4AYPCh. 21.3 - Prob. 5AYPCh. 21.3 - Prob. 6AYPCh. 21.4 - Prob. 7AYPCh. 21.4 - Prob. 8AYPCh. 21.4 - Prob. 9AYPCh. 21.4 - Prob. 10AYP
Ch. 21.4 - Plan a response for a situation in which a patient...Ch. 21.4 - Compare and contrast antigenic drift and antigenic...Ch. 21.5 - Prob. 2CFCh. 21.5 - Prob. 13AYPCh. 21.5 - Prob. 14AYPCh. 21.5 - Prob. 15AYPCh. 21.5 - Prob. 16AYPCh. 21.5 - Prob. 17AYPCh. 21.5 - Prob. 18AYPCh. 21.5 - Prob. 19AYPCh. 21 - Prob. 1CFCh. 21 - Prob. 1MCQCh. 21 - Prob. 2MCQCh. 21 - Which is not a characteristic of Streptococcus...Ch. 21 - The common stain used to identify Mycobacterium...Ch. 21 - Prob. 5MCQCh. 21 - Prob. 6MCQCh. 21 - Which of the following infections often has a...Ch. 21 - Prob. 8MCQCh. 21 - Prob. 9MCQCh. 21 - Prob. 10MCQCh. 21 - Prob. 11TFCh. 21 - Prob. 12TFCh. 21 - Prob. 13TFCh. 21 - Prob. 14TFCh. 21 - Prob. 15TFCh. 21 - Prob. 1CTQCh. 21 - Prob. 2CTQCh. 21 - Prob. 3CTQCh. 21 - Prob. 4CTQCh. 21 - Prob. 5CTQCh. 21 - Prob. 6CTQCh. 21 - In an episode of the television show House. Dr....Ch. 21 - Prob. 8CTQCh. 21 - Prob. 9CTQCh. 21 - Prob. 10CTQCh. 21 - Prob. 1CCCh. 21 - Prob. 2CCCh. 21 - Prob. 3CCCh. 21 - Prob. 4CCCh. 21 - Prob. 1VCCh. 21 - Prob. 2VCCh. 21 - Prob. 1CM
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- 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:arrow_forwarda. What percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. b. What will happen to elimination of the drug in the previous question if the system is saturated? explain and show any math involvedarrow_forwardIf you wanted to reduce the difference between peak and trough levels that occur with repeated administration of a drug, how would you adjust the dose and dose interval without changing the plateau concentration (plateau is the average of peak and trough levels)? Select your answers for both dose and interval. Hint: It may be helpful to think about this problem using an example such as food. How would you eat if you wanted to maintain very steady hunger/satiety levels without changing your total caloric intake? Options: A. Dose; Increase dose B. Dose; Decrease dose C. Dose; Do not change dose D. Interval; Increase the interval between doses (give the drug less frequently) E. Interval; Decrease the interval between doses (give the drug more frequently) F. Interval; Do not change the intervalarrow_forward
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