Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 3, Problem 4AC
Saliva from infected deer can transmit chronic wasting disease, caused by misfolded prion proteins. The infectious prions can persist in soil. How might the disease pass from an infected animal to others in the herd?
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4.
You find that all four flower color genes map to the second
chromosome, and perform complementation tests with deletions for each
gene. You obtain the following results:
(mutant a = blue, mutant b = white, mutant c = pink, mutant d = red)
wolod
Results of Complementation tests
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Jostum
Mutant a
b
с
Del (2.2 -2.6)
blue
white
pink
purple
Del (2.3-2.8)
blue
white
pink
red
Del (2.1 -2.5)
blue
purple
pink
purple
Del (2.4-2.7)
purple
white
pink
red
C
d
Indicate where each gene maps:
a
b
ori ai indW (anioq 2) .8
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1. Below is a pedigree of a rare trait that is associated with a variable number
repeat. PCR was performed on individuals using primers flanking the VNR,
and results are shown on the agarose gel below the pedigree.
I.1 1.2 II.1 II.2 II.3 II.4 II.5 II.6 11.7 III.1 III.2 III.3 III.4etum
A. (5 points) What is the mode of inheritance?
B. (10 points) Fill in the expected gel lanes for II.1, II.5, III.2, III.3 and III.4
C. (5 points) How might you explain the gel results for II.4?
To study genes that create the purple flower color in peas, you isolate 4 amorphic mutations. Each results in a flower with a different color, described
mutant a = blue
mutant c = pink
mutant b = white
mutant d = red
A. In tests of double mutants, you observe the following phenotypes:
mutants a and b = blue
mutants b and c = white
mutants c and d = pink
Assuming you are looking at a biosynthetic pathway, draw the pathway indicating which step is affected by each mutant.
B. What is the expected flower color of a double mutant of a and c?
Chapter 3 Solutions
Biology: Life on Earth
Ch. 3 - Fill-in-the-Blank In organic molecules made of...Ch. 3 - 5. Fill in the following with the appropriate type...Ch. 3 - Fill-in-the-Blank Proteins are synthesized by a...Ch. 3 - Fill-in-the-Blank Till in the following with the...Ch. 3 - Fill-in-the-Blank A nucleotide consists of three...Ch. 3 - Prob. 1RQCh. 3 - List the four principal classes of biological...Ch. 3 - What roles do nucleotides play in living...Ch. 3 - Prob. 4RQCh. 3 - Prob. 5RQ
Ch. 3 - Prob. 6RQCh. 3 - Describe the synthesis of a protein from amino...Ch. 3 - Where in nature do we find cellulose? Where do we...Ch. 3 - Which kinds of bonds between keratin molecules are...Ch. 3 - In this chapter, you read that a phospholipid has...Ch. 3 - Prob. 2ACCh. 3 - Some people think that consuming fat and sugar...Ch. 3 - Saliva from infected deer can transmit chronic...Ch. 3 - In an alternate universe where people could digest...
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