One complication of making a transgenic animal is that thetransgene might integrate at random into the coding region, orthe regulatory region, of an endogenous gene. What might be theconsequences of such random integrations?
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One complication of making a transgenic animal is that the
transgene might integrate at random into the coding region, or
the regulatory region, of an endogenous gene. What might be the
consequences of such random integrations?
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- One complication of making a transgenic animal is that thetransgene might integrate at random into the coding region, orthe regulatory region, of an endogenous gene. What might be theconsequences of such random integrations? How might this complicategenetic analysis of the transgene?The ability to selectively modify the genome in the mouse has revolutionized mouse genetics. Outline the procedure for generating a knockout mouse at a specific genetic locus. How can the loxP-Cre system be used to conditionally knock out a gene? What is an important medical application of knockout mice?In selecting target cells to receive a transferred gene in gene therapy, what factors do you think would have to be taken into account?
- 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.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),…Would gene chips containing bacterial DNA segments be useful for monitoring gene expression in a mammalian cell?
- During experimental RNAi, how does the researcher affect expression of a target gene? Group of answer choices Inject custom, lab-made double-stranded RNA into the specimen that will be targeted by the cell's existing Dicer to create siRNA complementary to the target gene's transcript. Inject lab-made Dicer proteins into the specimen which will cut up the target gene's transcript. Inject custom, lab-made siRNAs complementary to the target gene's transcript.In the module, you have learned about P-element mediated transgenesis in Drosophila and the concept of using transgenes to rescue mutant phenotypes. In the figure below, you will see a wild type fly with its natural eye colour and three mutants with their eye colours changed to vermillion, white and rosy, respectively. A schematic of P-element mediated transgenesis (as shown in the lectures) is also included in the figure. Please inspect the schematic carefully and choose which of the following statements is true: I. Injection of the white experimental transgene into the vermillion mutant embryo will not change the vermillion mutant phenotype II. Injection of the white experimental transgene in the rosy mutant embryo will change rosy eye colour to red (wild type) III. Injection of the white experimental transgene in the white mutant embryo will not change the white mutant phenotype IV. Injection of the white experimental transgene in the rosy mutant…What are some of the problems that might arise if you were trying to produce a eukaryotic protein in a bacterium? How ight using transgenic plants or animals help solve some of these problems?
- There is a hypothetical gene related to the nervous system of Drosophila. Describe all the methods, steps, and key substances you need to obtain to use the following techniques in experimental design to study the gene: - In situ hybridization (to find the mRNA) - Immunohistochemistry (to find the protein) - CRISPR-Cas9 (for loss of function) - Expression vector (for gain of function)The sequencing of entire genomes has made it possible to examine the level of gene expression in a particular cell or tissue by using oligonucleotide probes to assess the mRNA expression level from a particular gene. This is done most effectively through the use of what experimental technique?Treatment of adenosine deaminase (ADA) deficiency is an exampleof ex vivo gene therapy. Why is this therapy called ex vivo?Can ex vivo gene therapy be used to treat all inherited diseases?Explain.