Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 14, Problem 23P
Mutations in the CFTR gene result in cystic fibrosis in humans, a condition in which abnormal secretions are present in the lungs, pancreas, and sweat glands. In the effort to positionally clone the CFTR gene, the gene was mapped to a region of
Using your knowledge of the disease symptoms, how would you distinguish between the candidate genes to decide which is most likely to encode the CFTR gene?
How would you prove that your chosen candidate is the CFTR gene?
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Scientists carried out a microarray analysis to compare the gene expression of normal pancreatic cells to that of cancer cells from a person with pancreatic cancer. The scientists labeled the cDNA from the normal pancreatic cells with green fluorescent nucleotides. They labeled the cDNA from the cancer cells with red fluorescent nucleotides. The two cDNAs were mixed and allowed to hybridize to a microarray.
Less p53 activity is found in cancer pancreatic cells than normal cells. What color would the spot for the p53 gene be on the microarray?
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Genes with highly similar sequence are often located adjacent one another in the genome. Gene duplication commonly arises from errors in replication. When the organization of such adjacent genes is in an inverted orientation, this can reduce the expression of other genes that have similar sequence and are located on other chromosomes. Explain the mechanism of how this generally occurs.
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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?
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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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- Identical (monozygotic) twins have identical genomes. In one pair of identical twins, they inherit a dominant, disease-causing allele from one of their biological parents. However, one twin has symptoms of the genetic disease while the other does not. This is likely an example of… 1.) RNA interference 2.) pleiotropy 3.) DNA methylation 4.) alternative splicing 5.) incomplete penetrancearrow_forwardThe accompanying photo shows a sequencing gel from the original study that first sequenced the cystic fibrosis gene (J. R. Riordan et al. 1989. Science 245:1066–1073). From the photo, determine the sequence of the normal copy of the gene and the sequence of the mutated copy of the gene. Identify the location of the mutation that causes cystic fibrosis. (Hint: The CF mutation is a 3-bp deletion.)arrow_forwardThe phenotype of a heterozygous mouse (Aa) is agouti. The agouti banding pattern is due to altered expression of the agouti gene. Which of the following statement is false? a) Expression of the agouti gene inhibits the production of eumelanin. b) Evidence suggests that the agouti gene is only expressed in tissues associated with fur production. c) Epigenetic markers silence the agouti gene resulting in dark pigmentation at the tip and root of the hair. d) All of the abovearrow_forward
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