The extensive polymorphism of MHC genes in the population is thought to represent an evolutionary response to outflank the evasive strategies of pathogens. This polymorphism makes it difficult for pathogens to eliminate all potential MHC binding epitopes from their proteins. Based on this reasoning, it would seem advantageous for each individual to encode more than three different MHC class I and three different MHC class II genes per chromosome copy. If some individuals in the population had MHC loci that encoded 10 different MHC class I and 10 different MHC class II genes, the T cell repertoire in those individuals would likely be: Much more diverse than in the rest of the individuals of that population Much better at recognizing rare pathogens not encountered by most individuals in that population Much less diverse than the rest of the individuals in that population Much more alloreactive than the T cells found in the other individuals of that population Very reactive to bacterial and viral superantigens
The extensive polymorphism of MHC genes in the population is thought to represent an evolutionary response to outflank the evasive strategies of pathogens. This polymorphism makes it difficult for pathogens to eliminate all potential MHC binding epitopes from their proteins. Based on this reasoning, it would seem advantageous for each individual to encode more than three different MHC class I and three different MHC class II genes per chromosome copy. If some individuals in the population had MHC loci that encoded 10 different MHC class I and 10 different MHC class II genes, the T cell repertoire in those individuals would likely be: Much more diverse than in the rest of the individuals of that population Much better at recognizing rare pathogens not encountered by most individuals in that population Much less diverse than the rest of the individuals in that population Much more alloreactive than the T cells found in the other individuals of that population Very reactive to bacterial and viral superantigens
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The extensive polymorphism of MHC genes in the population is thought to represent an evolutionary response to outflank the evasive strategies of pathogens. This polymorphism makes it difficult for pathogens to eliminate all potential MHC binding epitopes from their proteins. Based on this reasoning, it would seem advantageous for each individual to encode more than three different MHC class I and three different MHC class II genes per chromosome copy. If some individuals in the population had MHC loci that encoded 10 different MHC class I and 10 different MHC class II genes, the T cell repertoire in those individuals would likely be:
- Much more diverse than in the rest of the individuals of that population
- Much better at recognizing rare pathogens not encountered by most individuals in that population
- Much less diverse than the rest of the individuals in that population
- Much more alloreactive than the T cells found in the other individuals of that population
- Very reactive to bacterial and viral superantigens
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