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Why is it more likely that insertions or deletions will be more detrimental to a cell than point mutations?
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- Why is it more likely that insertions or deletions will be more detrimental to a cell than point mutations?Although it is well known that X-rays cause mutations, they are routinely used to diagnose medical problems, including potential tumors, broken bones, and dental cavities. Why is this done? What precautions need to be taken?Gene mutations can be classified in two major ways:(1) hereditary or germline mutations that are inherited from a parent and are present throughout a person’s life in virtually every cell in the body.(2) acquired or somatic mutations that occur at some time during a person’s life and are present only in certain cells, not in every cell in the body.If there is no family history of a particular disease but a child has the disease then it may have arisen due to a(n) ________ mutation early during development. A) acquired B) inherited C) silent D) transition
- Describe four types of point mutations: transitions,transversions, deletions, and insertions.Name three different types of loss of function mutations and in each case explain how the mutation exerts a loss of function effect on a geneIn the replica plate experiment, it shows that mutations are random. However, certain environmental stresses (such as high temperature, high salt, and low pH) can increase the mutation rate. QUESTIONS: Does this indicate that mutations are nonrandom, since they increase in response to cell stressors?
- Two types of mutations discussed in this chapter are 1) nucleotide changes and 2) unstable genome regions that undergo dynamic changes. Describe each type of mutation.Exposure to various chemicals can cause DNA mutations. Classify the examples as representative of transition, transversion, or nsertion/deletion mutations. Transition replacement of T:A: with C:G treatment with nitrogen mustard causes this type of mutation oxidative deamination via nitrous acid causes this type of mutation treatment with 5-bromouracil causes the replacement of A:T with G:C Transversion replacement of G:C with T:A Answer Bank Insertion/Deletion the removal of one or more base pairs treatment with proflavin causes this type of mutationWhat are mutations and what causes them? Are mutations helpful, harmful, or both? Explain