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With age, somatic cells are thought to accumulate genomic "scars"as a result of the inaccurate repair of double-strand breaks by non homologous end-joining (NHEJ). Estimates based on the frequency of breaks in primary human fibroblasts suggest that by age 70 each human somatic cell may carry some 2000 NHEJ-induced mutations due to inaccurate repair. If these mutations were distributed randomly around the genome, how many genes would you expect to be affected? Would you expect cell function to be compromised? Why or why not? (Assume that 2% of the genome - 1.5% coding and 0.5% regulatory - is crucial information.)

With age, somatic cells are thought to accumulate genomic "scars"as a result of the inaccurate repair of double-strand breaks by non homologous end-joining (NHEJ). Estimates based on the frequency of breaks in primary human fibroblasts suggest that by age 70 each human somatic cell may carry some 2000 NHEJ-induced mutations due to inaccurate repair. If these mutations were distributed randomly around the genome, how many genes would you expect to be affected? Would you expect cell function to be compromised? Why or why not? (Assume that 2% of the genome - 1.5% coding and 0.5% regulatory - is crucial information.)

Human Anatomy & Physiology (11th Edition)
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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With age, somatic cells are thought to accumulate genomic "scars"as a result of the inaccurate repair of double-strand breaks by non homologous end-joining (NHEJ). Estimates based on the frequency of breaks in primary human fibroblasts suggest that by age 70 each human somatic cell may carry some 2000 NHEJ-induced mutations due to inaccurate repair. If these mutations were distributed randomly around the genome, how many genes would you expect to be affected? Would you expect cell function to be compromised? Why or why not? (Assume that 2% of the genome - 1.5% coding and 0.5% regulatory - is crucial information.)
Transcribed Image Text:With age, somatic cells are thought to accumulate genomic "scars"as a result of the inaccurate repair of double-strand breaks by non homologous end-joining (NHEJ). Estimates based on the frequency of breaks in primary human fibroblasts suggest that by age 70 each human somatic cell may carry some 2000 NHEJ-induced mutations due to inaccurate repair. If these mutations were distributed randomly around the genome, how many genes would you expect to be affected? Would you expect cell function to be compromised? Why or why not? (Assume that 2% of the genome - 1.5% coding and 0.5% regulatory - is crucial information.)
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