The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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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:

Answer 2

Question

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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Answer 3

Question

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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Answer 4

Question

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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Answer 5

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Answer 6

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Answer 7

Chapter 22, Problem 8TYR

Summary Introduction

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Answer 8

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Answer 11

Ch. 22.1 - Prob. 1AWYK Ch. 22.1 - Prob. 1BYGO Ch. 22.1 - Prob. 2BYGO Ch. 22.1 - Prob. 3BYGO Ch. 22.2 - If we regard red bone marrow as a lymphatic organ...Ch. 22.2 - Prob. 2AWYK Ch. 22.2 - Prob. 3AWYK Ch. 22.2 - Prob. 4BYGO Ch. 22.2 - Prob. 5BYGO Ch. 22.2 - Prob. 6BYGO

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Solution Summary: The author explains that autoimmune diseases arise due to abnormal immune responses to the normal body. Negative selection tests the binding capabilities of CD4 and CD8 receptors.

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Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

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Chapter 22 Solutions

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Solution Summary: The author explains that autoimmune diseases arise due to abnormal immune responses to the normal body. Negative selection tests the binding capabilities of CD4 and CD8 receptors.

Videos

Introduction: The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.

Want to see the full answer?

Chapter 22 Solutions

Introduction:

The autoimmune diseases arise due to abnormal immune responses to the normal body. The negative selection in the medulla obliterates the T cells that bind to the self-antigens expressed on MHC molecules. The selection process helps in tolerance of self by the immune system.