NESTER'S MICROBIOLOGY: A HUMAN PERSPECT
9th Edition
ISBN: 9781260161373
Author: Anderson, SALM
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 10, Problem 10MC
Which of the following is false?
a)Tropheryma whipplei could be identified before it had been grown in culture.
b) The GC content of DNA can be measured by determining the temperature at which double-stranded DNA melts.
c) Sequence differences between organisms can be used to assess their relatedness.
d) Based on DNA homology studies, members of the genus Shigella should be in the same species as Escherichia coli.
e) Gel electrophoresis is used to determine the serotype of an organism.
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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?
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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…
Chapter 10 Solutions
NESTER'S MICROBIOLOGY: A HUMAN PERSPECT
Ch. 10 - Name and describe the three areas of taxonomy.Ch. 10 -
2. Explain the basis for the three-domain systems...Ch. 10 -
3. Describe how a dichotomous key is used when...Ch. 10 - Why is MALDI-TOF MS particularly important in...Ch. 10 -
5. Describe the difference between using a probe...Ch. 10 -
6. Explain how signature sequences are used in...Ch. 10 - Describe the function of PulseNet.Ch. 10 - What is a phylogenetic tree?Ch. 10 - Prob. 9SACh. 10 - Describe how the GC content of DNA can be...
Ch. 10 - Which of the following is the newest taxonomic...Ch. 10 -
2. If an acid-fast bacterium is detected in a...Ch. 10 -
3. The “breath test” for Helicobacter pylori...Ch. 10 - The “O157:H7” of E. coli O157:H7 refers to the a)...Ch. 10 - When hydrogen peroxide is placed on a colony of an...Ch. 10 - Which of the following is best to use for...Ch. 10 - If the GC content of two organisms is 70%, the a)...Ch. 10 - If two microbial isolates have similar but...Ch. 10 - The sequence of which ribosomal genes are most...Ch. 10 - Which of the following is false? a)Tropheryma...Ch. 10 -
1. Microbiologists debate the use of biochemical...Ch. 10 - A researcher interested in investigating the...Ch. 10 - Prob. 1CTCh. 10 - When DNA probes are used to detect specific...
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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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