Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 13.5, Problem 1CR
What is fitness? To what degree does fitness depend on the environment in which organisms live?
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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:
a. 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 involved
Chapter 13 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 13.1 - What characteristics would have made the surface...Ch. 13.1 - How do we know when oceans were first present on...Ch. 13.1 - What lines of reasoning support the hypothesis...Ch. 13.1 - What is LUCA, and what is a plausible explanation...Ch. 13.2 - Why is the origin of cyanobacteria considered a...Ch. 13.2 - What caused the development of banded iron...Ch. 13.2 - What lines of evidence indicate that microbial...Ch. 13.2 - Why was the origin of cyanobacteria of such...Ch. 13.3 - What kinds of evidence support the three-domain...Ch. 13.3 - What is LUCA and what are some of its...
Ch. 13.3 - Which of the three domains is the least ancient?Ch. 13.3 - What evidence supports the classification of life...Ch. 13.4 - What evidence supports the idea that the...Ch. 13.4 - In what ways are modern eukaryotes a combination...Ch. 13.4 - Describe the different hypotheses for the...Ch. 13.4 - What is the endosymbiotic hypothesis for the...Ch. 13.5 - What are the different processes that give rise to...Ch. 13.5 - What is the difference between selection and...Ch. 13.5 - In the experiment of Figure 13.12, why did the...Ch. 13.5 - What is fitness? To what degree does fitness...Ch. 13.6 - What is the difference between the core and pan...Ch. 13.6 - What kind of recombination might have the greatest...Ch. 13.6 - What effects do deletions have on the evolution of...Ch. 13.6 - What are some processes that influence the content...Ch. 13.7 - How are DNA sequences obtained for phylogenetic...Ch. 13.7 - What does a phylogenetic tree depict?Ch. 13.7 - Prob. 3MQCh. 13.7 - What is the difference between a gene tree and an...Ch. 13.8 - What is the difference between taxonomy and...Ch. 13.8 - What are some key criteria from the phylogenetic...Ch. 13.8 - How many species of Bacteria and Archaea have been...Ch. 13.8 - What is the "species problem" and why is the...Ch. 13.9 - What class of genes is used in MLST analyses?Ch. 13.9 - How is ribotyping different from rep-PCR?Ch. 13.9 - What is FAME analysis?Ch. 13.9 - Prob. 1CRCh. 13.10 - What roles do culture collections play in...Ch. 13.10 - What is the IJSEM and what taxonomic function does...Ch. 13.10 - Why might viable cell cultures be of more use in...Ch. 13.10 - Prob. 1CRCh. 13 - Compare and contrast the physical and chemical...Ch. 13 - For the following sequences, construct the...Ch. 13 - Imagine that you have been given several bacterial...Ch. 13 - Imagine that you have discovered a new form of...
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