Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 9, Problem 8PDQ
What observations are consistent with the conclusion that DNA serves as the genetic material in eukaryotes? List and discuss them.
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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 9 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 9 - CASE STUDY |Zigs and zags of the smallpox virus...Ch. 9 -
CASE STUDY | Zigs and zags of the smallpox...Ch. 9 - CASE STUDY | Zigs and zags of the smallpox...Ch. 9 - CASE STUDY | Zigs and zags of the smallpox virus...Ch. 9 -
HOW DO WE KNOW?
1. In this chapter, we have...Ch. 9 - Review the Chapter Concepts list on p. 160. Most...Ch. 9 - Discuss the reasons why proteins were generally...Ch. 9 -
4. Contrast the various contributions made to our...Ch. 9 - When Avery and his colleagues had obtained what...Ch. 9 - Why were 32P and 35S chosen in the Hershey–Chase...
Ch. 9 - Does the design of the Hershey-Chase experiment...Ch. 9 - What observations are consistent with the...Ch. 9 - What are the exceptions to the general rule that...Ch. 9 -
10. Draw the chemical structure of the three...Ch. 9 - How are the carbon and nitrogen atoms of the...Ch. 9 - Adenine may also be named 6–amino purine. How...Ch. 9 -
13. Draw the chemical structure of a dinucleotide...Ch. 9 - Describe the various characteristics of the...Ch. 9 - Prob. 15PDQCh. 9 - What might Watson and Crick have concluded, had...Ch. 9 - Prob. 17PDQCh. 9 - Prob. 18PDQCh. 9 - Prob. 19PDQCh. 9 - Prob. 20PDQCh. 9 - Prob. 21PDQCh. 9 - Prob. 22PDQCh. 9 -
23. Why is Tm related to base composition?
Ch. 9 - What is the chemical basis of molecular...Ch. 9 - What did the Watson–Crick model suggest about the...Ch. 9 - A genetics student was asked to draw the chemical...Ch. 9 - Prob. 27PDQCh. 9 -
28. One of the most common spontaneous lesions...Ch. 9 - Prob. 29PDQCh. 9 - Prob. 30PDQCh. 9 - Prob. 31PDQCh. 9 -
32. During electrophoresis, DNA molecules can...Ch. 9 - Assume that you are interested in separating short...
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