X linked recessive mutations in the dystrophin gene cause muscular dystrophy. The gene is enormous, over 1 million base pairs. Because it is that large, the gene can not be readily inserted into a virus for gene therapy. What other technique that we have discussed could you use to do gene therapy on this condition?
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Genetics Question 5
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- 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) transitionShown below are the maps of a series of rII− deletion strains (1–5). The deleted region is indicated as (......) and the intact region as ______. 1 ___________(...........)_______________ 2 _________________(...........)_________ 3 (.....................)_____________________ 4 ________________________(................) 5 _____(..........)______________________ rII− phage strains A-E have point mutations in the rII region. E.coli K(λ) cells are coinfected with one phage that has a deletion and one phage that has a point mutation. The presence of wild-type progeny phage is assessed by the presence (+) or absence (o) of plaques. 1 2 3 4 5 A + o + + + B o + + + + C + + + o + D + + o + + E + + o + o A) Indicate the order of the point mutations in the rII region. A) CADBE B) DEBAC C) BADCE D) ABDEC E) CEADB B) The test described here is a recombination test. Explain…Researchers have identified a gene in humans that (when mutated) causes tremors and unstable walking due to neurological problems. This disorder is inherited in an autosomal recessive manner, and the mutant allele isknown to result from a loss-of-function mutation. The same gene hasbeen found in mice, although a mutant mouse version has not beendiscovered. To develop an effective drug therapy to treat this disorderin humans, it would be experimentally useful to have a mouse model.In other words, it would be desirable to develop a strain of mice thatcarry the mutant allele in the homozygous condition. How would youdevelop such a strain?
- What is the underlying genetic defect that causes xeroderma pigmentosum?How can the symptoms of this disease be explained by the genetic defect?In contrast with the genomic manipulations of animals and plants described in this chapter, human genetherapy is directed specifically at altering the genomes of somatic cells rather than germ-line cells.Why couldn’t or wouldn’t medical scientists try to alter the genome of human germ-line cells?this is what i have said about this image so far, what else can be said aswell including the raw count column. " Interpreting the results of an RNA-Seq analysis is pivotal in understanding the underlying genetic mechanisms of diseases such as breast cancer. In this analysis, Figure 1 provides comprehensive data on differentially expressed genes associated with breast cancer. By delving into the provided information, we can gain valuable insights into the molecular landscape of this disease. First focus is on the gene with the highest fold change, EYA4, situated on chromosome 6. With a staggering fold change of 3604.4176, EYA4 exhibits an unprecedented level of overexpression in cancerous cells compared to normal cells. This profound alteration suggests a pivotal role for EYA4 in breast cancer pathogenesis. The log2 fold change of 11.81555 further emphasizes the magnitude of this difference in gene expression. Statistical significance is evident, with an exceptionally low p-value of…
- 1). In the absence of this enzyme, a substance called ceroid lipofuscin accumulates in lysosomes in the brain, resulting in seizures, blindness, decline in cognitive function and motor skills, dementia, and death by the late teens or early 20’s. The TPP1 gene is 6695 bp in length. Think about the characteristics of Batten disease, and then suggest an approach to gene therapy that might be effective for this specific genetic disorder. You may assume that your research team is working in the U.S. and your research is funded by a grant from the National Institutes of Health (NIH). Please EXCLUDE the use of CRISPR from consideration. A. Will you use germline or somatic cell gene therapy? Please NAME and DEFINE the form of gene therapy selected, then explain WHY this is the most appropriate choice.1). In the absence of this enzyme, a substance called ceroid lipofuscin accumulates in lysosomes in the brain, resulting in seizures, blindness, decline in cognitive function and motor skills, dementia, and death by the late teens or early 20’s. The TPP1 gene is 6695 bp in length. Think about the characteristics of Batten disease, and then suggest an approach to gene therapy that might be effective for this specific genetic disorder. You may assume that your research team is working in the U.S. and your research is funded by a grant from the National Institutes of Health (NIH). Other scientists have suggested that it might be possible to use CRISPR to treat this genetic disorder in affected individuals. (i) First, what is CRISPR? (BRIEFLY describe what it is and how it works). (ii) Briefly describe how CRISPR could be utilized in treating genetic conditions such as Batten disease.1). In the absence of this enzyme, a substance called ceroid lipofuscin accumulates in lysosomes in the brain, resulting in seizures, blindness, decline in cognitive function and motor skills, dementia, and death by the late teens or early 20’s. The TPP1 gene is 6695 bp in length. Think about the characteristics of Batten disease, and then suggest an approach to gene therapy that might be effective for this specific genetic disorder. You may assume that your research team is working in the U.S. and your research is funded by a grant from the National Institutes of Health (NIH). a) Hypothetically, what specific type of VECTOR will you use to perform your gene therapy? Please select from the following list of potential vectors: disabled retrovirus, adenovirus, adeno-associated virus (AAV), or herpes simplex virus (HSV), then give two reasons why this specific vector is the most appropriate for your gene therapy. Please explain why you were able to rule out the other potential…
- Mouse models for human genetic diseases are potentially powerful tools to help geneticists understand thecause of the aberrant phenotypes and develop newtherapeutic measures. However, such mice are not always as useful to investigators as it might seem at firstglance. Suppose that you have a mouse knockoutmodel for a human disease caused by homozygosityfor a null allele of a gene. Discuss how the followingsituations might complicate investigations of the human disease based on this mouse model.a. Mice have a shorter life span than humans.b. Mice homozygous for certain knockout mutationsdie in utero.c. Mouse genomes may have additional copies of thegene whose mutation causes the disease in humans.d. Mice from different inbred lines homozygous forthe same gene knockout vary in the penetrance andexpressivity of the phenotype.e. Manipulations to create the knockout mouse, suchas the presence of a drug resistance gene that allowsthe selection of cells containing the knockout (seeFig. 18.9),…Mouse models for human genetic diseases are potentially powerful tools to help geneticists understand thecause of the aberrant phenotypes and develop newtherapeutic measures. However, such mice are not always as useful to investigators as it might seem at firstglance. Suppose that you have a mouse knockoutmodel for a human disease caused by homozygosityfor a null allele of a gene. Discuss how the followingsituations might complicate investigations of the human disease based on this mouse model.a. Mice have a shorter life span than humans.b. Mice homozygous for certain knockout mutationsdie in utero.c. Mouse genomes may have additional copies of thegene whose mutation causes the disease in humans.A neutral mutation is, by definition, a mutation that does not result in the change of the encoded amino acid sequence of a gene. 1)True 2)False