Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Chapter 20, Problem 30SAQ
What events can result in autoimmune disease?
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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 20 Solutions
Anatomy & Physiology (6th Edition)
Ch. 20.1 - What distinguishes the innate defense system from...Ch. 20.1 - What is the first line of defense against disease?Ch. 20.2 - What is opsonization and how does it help...Ch. 20.2 - Under what circumstances might NK cells kill our...Ch. 20.2 - What are the cardinal signs of inflammation and...Ch. 20.3 - Name three key characteristics of adaptive...Ch. 20.3 - What is the difference between a complete antigen...Ch. 20.3 - What marks a cell as self as opposed to nonselfCh. 20.4 - What event (or observation) signals that a B or T...Ch. 20.4 - Which of the following T cells would survive...
Ch. 20.4 - Prob. 11CYUCh. 20.4 - In clonal selection, who does the selecting? What...Ch. 20.5 - Why is the secondary response to an antigen so...Ch. 20.5 - Prob. 14CYUCh. 20.5 - Which class of antibody is most abundant in blood?...Ch. 20.5 - List four ways in which antibodies can bring about...Ch. 20.5 - Prob. 17CYUCh. 20.6 - Class II MHC proteins display what kind of...Ch. 20.6 - Which type of T cell is the most important in both...Ch. 20.6 - Describe the killing mechanism of cytotoxic T...Ch. 20.7 - Prob. 21CYUCh. 20.7 - Prob. 22CYUCh. 20 - All of the following are considered innate body...Ch. 20 - The process by which neutrophils squeeze through...Ch. 20 - Antibodies released by plasma cells are involved...Ch. 20 - Which of the following antibodies can fix...Ch. 20 - Which antibody class is abundant in body...Ch. 20 - Small molecules that must combine with large...Ch. 20 - Lymphocytes that develop immunocompetence in the...Ch. 20 - Cells that can directly attack target cells...Ch. 20 - Prob. 9MCCh. 20 - The cell type most often invaded by HIV is a(n)...Ch. 20 - Complement fixation promotes all of the following...Ch. 20 - Using the letters from column B, match the cell...Ch. 20 - Besides acting as mechanical barriers, the skin...Ch. 20 - Explain why attempts at phagocytosis are not...Ch. 20 - What is complement? How does it cause bacterial...Ch. 20 - Interferons are referred to as antiviral proteins....Ch. 20 - Differentiate between humoral and cellular...Ch. 20 - Although the adaptive immune system has two arms,...Ch. 20 - Define immunocompetence and self-tolerance. How is...Ch. 20 - Differentiate between a primary and a secondary...Ch. 20 - Prob. 21SAQCh. 20 - What is the role of the variable regions of an...Ch. 20 - Name the five antibody classes and describe where...Ch. 20 - How do antibodies help defend the body?Ch. 20 - Do vaccines produce active or passive humoral...Ch. 20 - Prob. 26SAQCh. 20 - Describe the specific roles of helper, regulatory,...Ch. 20 - Prob. 28SAQCh. 20 - Prob. 29SAQCh. 20 - What events can result in autoimmune disease?Ch. 20 - Prob. 1CCSCh. 20 - Prob. 2CCSCh. 20 - Prob. 3CCSCh. 20 - Prob. 4CCSCh. 20 - Remember Mr. Ayers, the bus driver from Chapter...
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