Domanda del libro di testo
How do we know that DNA repair mechanisms detect and correct the majority of spontaneous and induced mutations?
647
views
Ch. 14 - Gene Mutation, DNA Repair, and Transposition
Klug10th EditionEssentials of GeneticsISBN: 9780135588789
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Introduction to Genetics16
- Ch. 2 - Mitosis and Meiosis28
- Ch. 3 - Mendelian Genetics37
- Ch. 4 - Modification of Mendelian Ratios53
- Ch. 5 - Sex Determination and Sex Chromosomes32
- Ch. 6 - Chromosome Mutations: Variation in Number and Arrangement37
- Ch. 7 - Linkage and Chromosome Mapping in Eukaryotes36
- Ch. 8 - Genetic Analysis and Mapping in Bacteria and Bacteriophages24
- Ch. 9 - DNA Structure and Analysis38
- Ch. 10 - DNA Replication29
- Ch. 11 - Chromosome Structure and DNA Sequence Organization22
- Ch. 12 - The Genetic Code and Transcription36
- Ch. 13 - Translation and Proteins27
- Ch. 14 - Gene Mutation, DNA Repair, and Transposition34
- Ch. 15 - Regulation of Gene Expression in Bacteria22
- Ch. 16 - Regulation of Gene Expression in Eukaryotes37
- Ch. 17 - Recombinant DNA Technology27
- Ch. 18 - Genomics, Bioinformatics, and Proteomics30
- Ch. 19 - The Genetics of Cancer21
- Ch. 20 - Quantitative Genetics and Multifactorial Traits37
- Ch. 21 - Population and Evolutionary Genetics45
Klug10th EditionEssentials of GeneticsISBN: 9780135588789Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testo
Klug 10th EditionCh. 14 - Gene Mutation, DNA Repair, and TranspositionProblema 3
Klug 10th EditionCh. 14 - Gene Mutation, DNA Repair, and TranspositionProblema 3Capitolo 14, Problema 3
What is a spontaneous mutation, and why are spontaneous mutations rare?
Guida verificata passo dopo passo1
Define a spontaneous mutation as a change in the DNA sequence that occurs naturally without any external influence, typically arising from errors during DNA replication or from natural chemical changes in the DNA.
Explain that spontaneous mutations can result from processes such as tautomeric shifts, depurination, deamination, or errors made by DNA polymerase during replication.
Discuss why spontaneous mutations are rare by highlighting the high fidelity of DNA replication mechanisms, including proofreading by DNA polymerase and mismatch repair systems that correct most errors before they become permanent mutations.
Mention that the chemical stability of DNA and cellular repair mechanisms also contribute to minimizing the frequency of spontaneous mutations.
Summarize that although spontaneous mutations occur naturally, their rarity is due to the combined effect of accurate DNA replication and efficient repair systems that maintain genetic integrity.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Spontaneous Mutation
A spontaneous mutation is a genetic change that occurs naturally without any external influence, often due to errors in DNA replication or spontaneous chemical changes in the DNA. These mutations arise randomly and can affect a single nucleotide or larger DNA segments.
Video consigliato:
Percorso guidato
09:52
Spontaneous Mutations
DNA Replication Fidelity
DNA replication fidelity refers to the accuracy with which DNA is copied during cell division. High fidelity is maintained by proofreading and repair mechanisms that correct errors, which significantly reduces the frequency of spontaneous mutations.
Video consigliato:
Percorso guidato
11:59Steps to DNA Replication
DNA Repair Mechanisms
DNA repair mechanisms are cellular processes that detect and fix damaged or incorrectly paired bases in DNA. These systems, such as mismatch repair and base excision repair, help maintain genetic stability by correcting spontaneous errors before they become permanent mutations.
Video consigliato:
Percorso guidato
05:44Repair Pathways
Pratica correlata
Domanda del libro di testo
Why would a mutation in a somatic cell of a multicellular organism not necessarily result in a detectable phenotype?
664
views
Domanda del libro di testo
How do we know that certain chemicals and wavelengths of radiation induce mutations in DNA?
533
views
Domanda del libro di testo
Most mutations are thought to be deleterious. Why, then, is it reasonable to state that mutations are essential to the evolutionary process?
751
views
Domanda del libro di testo
Why is a random mutation more likely to be deleterious than beneficial?
751
views
Domanda del libro di testo
Write a short essay contrasting how these concepts may differ between bacteria and eukaryotes.
465
views