Different changes of DNA behavior re- address(行为矫正) Chapte8: Mutation(突变) is bad (death and unhealthy y which needs to be repaired Chapter9: Recombination(重组) is good (diversity in a species beautiful), which is promoted Chapter10: Transposition(转座) is not bad because it is not repaired(benefit?)
Different changes of DNA -behavior re-address (行为矫正） ◼ Chapter 8: Mutation (突变) is bad (death and unhealthy), which needs to be repaired ◼ Chapter 9: Recombination (重组) is good (diversity in a speciesbeautiful), which is promoted ◼ Chapter 10: Transposition (转座) is not bad, because it is not repaired. (benefit?)
The consequence of high rates of mutation ■ Mutation in germ line〔生殖细胞) would destroy the species Mutation in soma(体细胞) would destroy the individual Maintenance of the correctness of the DNA sequence is definitely crucial for living organisms, Keeping the error rate as low as 10-10 is so expensive
The consequence of high rates of mutation ◼ Mutation in germ line (生殖细胞) would destroy the species ◼ Mutation in soma (体细胞) would destroy the individual. Maintenance of the correctness of the DNA sequence is definitely crucial for living organisms. Keeping the error rate as low as 10-10 is so expensive
Build up a serious attitude to sciencell! I absolutely do not agree with Waston et al. at the points described 3rd 4th paragraphs on page 235 1. What are the more reasonable explanations for the 10-10 mutation frequency in living organisms? 2. What are the evidences that such a low mutation rate can drive the evolvement of a new species if the cell changes are known harmful?
Build up a serious attitude to science!!! I absolutely do not agree with Waston et al. at the points described 3rd & 4th paragraphs on page 235 1. What are the more reasonable explanations for the 10-10 mutation frequency in living organisms? 2. What are the evidences that such a low mutation rate can drive the evolvement of a new species if the cell changes are known harmful?
Listen to the nature Mutation is not good and is naturally repaired thus it could not be responsible for biodiversity. Recombination is good and naturally promoted; it is responsible for diversity inside of species. Transposition is different from mutation and recombination because (1 producing mechanism is different; (2)no mechanism to correct it; 3) existing in nature in a well-controlled manner(1025). Not repaired but controlled
Listen to the nature ◼ Mutation is not good and is naturally repaired, thus it could not be responsible for biodiversity. ◼ Recombination is good and naturally promoted; it is responsible for diversity inside of species. ◼ Transposition is different from mutation and recombination because (1) producing mechanism is different; (2) no mechanism to correct it; (3) existing in nature in a well-controlled manner (10-5). Not repaired but controlled
● Molecular Biology course CHAPTER 9: The mutability and repair of dna 1. Replication errors and their repair 2. DNA damage 3. Repair of DNA damage @劣博字 ht o 2004 Pearson Education, Inc. publishing as benjamin Cummin Wuhan Universit
CHAPTER 9: The mutability and repair of DNA •Molecular Biology Course 1. Replication errors and their repair 2. DNA damage 3. Repair of DNA damage