Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 24P
How would you clone a gene that you have identified by a mutant
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If you wanted to analyze the size and abundance of the HOAP protein in an extract from a Drosophila animal that you think may be mutant for the HOAP gene, what method could you use to target your analysis specifically to the HOAP protein in that extract?
Draw a basket mutant embryo. What does basket encode? Why do the mutant embryos have this phenotype?
Most organisms display a circadian rhythm, a cycling of biological processes that is roughly synchronized with day length. In Drosophila, pupae eclose (emerge as adults after metamorphosis) at dawn.
a)Using this knowledge how would screen for Drosophila mutants that have an impaired circadian rhythm?
b)In each case, how would you clone the genes you identified by mutation?
Chapter 14 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Ch. 14 - 14.1 What are the advantages and disadvantages of...Ch. 14 - Prob. 2PCh. 14 - Discuss the similarities and differences between...Ch. 14 - 14.5 What are the advantages and disadvantages of...Ch. 14 - 14.6 You have cloned the mouse ortholog (see...Ch. 14 - 14.7 Diagram the mechanism by which CRISPRCas...Ch. 14 - 14.8 Describe how CRISPRCas has been modified to...Ch. 14 - 14.9 Discuss the advantages (and possible...Ch. 14 - 14.10 Discuss the advantages (and possible...Ch. 14 - You have identifies a gene encoding the protein...
Ch. 14 - You have identified a recessive mutation that...Ch. 14 - 14.13 The CBF genes of Arabidopsis are induced by...Ch. 14 - 14.14 When the S. cerevisiae genome was sequenced,...Ch. 14 - 14.15 Translational fusions between a protein of...Ch. 14 - 14.16 In humans, Duchenne’s muscular dystrophy is...Ch. 14 - 14.17 How would you perform a genetic screen to...Ch. 14 - In enhancer trapping experiments, a minimal...Ch. 14 - 14.19 In Genetic Analysis, we designed a screen to...Ch. 14 - How would you design a genetic screen to find...Ch. 14 - 14.21 The eyes of Drosophila develop from imaginal...Ch. 14 - 14.22 Given your knowledge of the genetic tools...Ch. 14 - Mutations in the CFTR gene result in cystic...Ch. 14 - 14.24 How would you clone a gene that you have...Ch. 14 - 14.25 How would you conduct a screen to identify...Ch. 14 - In land plants, there is an alternation of...Ch. 14 - 14.27 The Drosophila evenskipped (eve) gene is...Ch. 14 - Prob. 28PCh. 14 - 14.29 As shown in Figure, mutations in the...Ch. 14 - How would you edit a specific nucleotide in a...Ch. 14 - Through a forward genetics screen in Arabidopsis...Ch. 14 - The CRISPR - Cas 9 complex directs the Cas 9...Ch. 14 - 14.33 Describe how enhancer screens can be used to...Ch. 14 - How might you use CRISPR - Cas 9 to create a large...
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- How do we know that the mutant Bar-eye phenotype in Drosophila is due to a duplicated gene region rather than to a change in the nucleotide sequence of a gene?arrow_forwardHow would you devise a screen to identify recessive mutations in Drosophila that result in embryo lethality? How would you propagate the recessive mutant alleles?arrow_forwardExpression of recombinant proteins in yeast is an important tool for biotechnology companies that produce new drugs for human use. In an attempt to get a new gene X expressed in yeast, a researcher has integrated gene X into the yeast genome near a telomere. Will this strategy result in good expression of gene X? Why or why not? please try to explain a bit elaborately.arrow_forward
- Expression of recombinant proteins in yeast is an important tool for biotechnology companies that produce new drugs for human use. In an attempt to get a new gene X expressed in yeast, a researcher has integrated gene X into the yeast genome near a telomere. Will this strategy result in good expression of gene X? Why or why not? Would the outcome of this experiment differ if the experiment had been performed in a yeast line containing mutations in the H3 or H4 histone tails?arrow_forwardIn 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?arrow_forwardSuppose a researcher has three different Drosophila strains that have mutations in the bicoid gene called bicoid-A, bicoid-B, and bicoid-C; the wild type is designated bicoid +. To study these mutations, phenotypically normal female flies that are homozygous for the given bicoid mutation were obtained, and their oocytes were analyzed using a Northern blot to determine the size and/or amount of the bicoid mRNA and in situ hybridization to determine the bicoid mRNA location within the oocyte. A wild-type strain was also analyzed as a control. In both cases, the probe was complementary to the bicoid mRNA and the results are shown below. (Anterior is on the left; posterior is on the right.) Northern blot 1 2 - 3 4 In situ hybridization Wild type Lane 1. Wild type (bicoid*) Lane 2. bicoid-A Lane 3. bicoid-B Lane 4. bicoid-C bicoid-B bicoid-A bicoid-C Which mutation is likely to cause the embryo to develop two "anterior" ends? bicoid-B Obicoid-A bicoid-Carrow_forward
- Describe how P elements are used to producetransgenic Drosophila.arrow_forwardAlthough several different mammalian species have been cloned, the efficiency of this process is extremely low. Often tens or even hundreds of oocytes must be implanted with donor nuclei to obtain one healthy live birth. Many researchers believe the difficulties with cloning reside in the epigenetic modifications, such as DNA and histone methylation, that occur within various cells during an individual’s life. How do you suspect such modifications might affect the success of an experimentarrow_forwardA group of scientists sequenced the genomes of 12 species of Drosophila (Drosophila 12 Genomes Consortium. 2007. Nature 450:203–218). Data on genome sizes and numbers of protein-encoding genes from this study are given in the accompanying table. Plot the number of protein-encoding genes as a function of genome size for the 12 species of Drosophila. Is there a relation between genome size and number of genes in fruit flies? How does this compare with the relation between genome size and number of genes across all eukaryotes?arrow_forward
- What is using somatic nuclei of transgenic adults to generate other animals with identical genomes?arrow_forwardNext-generation sequencing reveals that six new mutations have occurred in the coding regions of genes in an individual diploid fly. If the coding regions of this fly comprise 100 million nucleotides per haploid genome, what is the mutation rate per nucleotide?arrow_forwardwhat are Several Limitations of positional cloning?arrow_forward
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