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 11, Problem 37P
In a mouse
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One mutation is a deletion of six nucleotides in the second exon of the gene and the other mutation is an insertion of two nucleotides in the third intron of the gene. Which is more likely to have a significant effect on the expression of a functional polypeptide from this gene?
Geneticists often use ethylmethane sulfonate (EMS) to induce mutations in Drosophila. Why is EMS a mutagen of choice for genetic research? What would be the effects of EMS in a strain of Drosophila lacking functional mismatch repair systems?
Select all the possible mutation types for the following observed phenotype resulting
from a mutation in a coding gene: A protein is made in normal amount, has a regular
shape, but is expressed in the wrong cells.
a up promoter mutation
a non conservative missense mutation
an in-frame insertion of 2 amino acids
a down promoter mutation
Chapter 11 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Ch. 11 - 11.1 Identify two general ways chemical mutagens...Ch. 11 - 11.2 Nitrous acid and (BU) alter DNA by different...Ch. 11 - 11.3 What is the difference between a transition...Ch. 11 - What is the difference between a synonymous...Ch. 11 - 11.5 UV irradiation causes damage to bacterial...Ch. 11 - Ultraviolet (UV) radiation is mutagenic.
What...Ch. 11 - Researchers interested in studying mutation and...Ch. 11 - The effect of base - pair substitution mutations...Ch. 11 - Describe the purpose of the Ames test. How are...Ch. 11 - 11.10 In numerous population studies of...
Ch. 11 - 11.11 Two different mutations are identified in a...Ch. 11 - What is the phenotype effect of inserting a Ds...Ch. 11 - 11.13 Answer the following questions concerning...Ch. 11 - Several types of mutation are identified and...Ch. 11 - 11.15 A sample of the bacterium is exposed to...Ch. 11 - 11.16 A strain of is identified as having a null...Ch. 11 - Describe the difference between DNA transposons...Ch. 11 - 11.18 How are flanking direct repeat sequences...Ch. 11 - 11.19 Using the adeninethymine base pair in this...Ch. 11 - The partial amino acid sequence of a wild-type...Ch. 11 - Prob. 21PCh. 11 - 11.22 Many human genes are known to have homologs...Ch. 11 - The fluctuation test performed by Luria and...Ch. 11 - In this chapter, three features of genes or of DNA...Ch. 11 - Briefly compare the production of DNA double -...Ch. 11 - During mismatch repair, why is it necessary to...Ch. 11 - 11.27 Following the spill of a mixture of...Ch. 11 - 11.28 In an Ames test using Salmonella bacteria a...Ch. 11 - A wild - type culture of haploid yeast is exposed...Ch. 11 - A fragment of a wild - type polypeptide is...Ch. 11 - Prob. 31PCh. 11 - Alkaptonuria is a human autosomal recessive...Ch. 11 - 11.33 In an experiment employing the methods of...Ch. 11 - Using your knowledge of DNA repair pathways choose...Ch. 11 - 11.35 Ataxia telangiectasia is a human inherited...Ch. 11 - A geneticist searching for mutations uses the...Ch. 11 - 11.37 In a mousebreeding experiment a new mutation...Ch. 11 - 11.38 Considering the Dumbo mutation in a Problem,...Ch. 11 - 11.39 Thinking back to the discussion of...Ch. 11 - 11.40 Common baker’s yeast () is normally grown at...Ch. 11 - 11.41 The two gels illustrated below contain...
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- 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.arrow_forwardGeneticists often use the alkylating agent ethylmethane sulfonate (EMS; see Figure 15.6) to induce mutations in Drosophila. Why is EMS a mutagen of choice for genetic research? What would be the effects of EMS in a strain of Drosophila lacking functional mismatch repair systems?arrow_forwardAlbinism is a condition where individuals can't make melanin pigment. The affected gene encodes for tyrosine aminotransferase, a key enzyme in melanin production. If you analyze the DNA of an albino individual, of the following mutations, which one is the least likely mutation responsible for the albino phenotype? A. A substitution of A to G at 3' splicing site. B. A deletion in the TATA box region. C. An insertion after the start codon. D. An extra stretch of TTAATT in intron 1.arrow_forward
- The figure shows the position of two of these mutations a and b. The nucleotides are altered in these 2 different swo-1 mutant alleles. Use the genetic table to describe any AA changes.Name the type of mutation and describe its effect on swo-1 mRNA and protein for each of the mutations. 3. The swo-1 a mutation (insertion between C and G). 4. The swo-1 b mutation (C-to-T mutation for indicated C). 5. The swo-1 a mutation leads to worms with more body wall muscle, whereas worms with the swo-1 b mutation are not able to move. Based on these phenotypes and the findings from questions 3 and 4, describe the role thewild-type version of this protein plays in muscle function.arrow_forwardSynpolydactyly is an abnormality characterized by webbing between partially or completely duplicated fingers or toes (Figure 18.15). The same mutations that cause the human phenotype give rise to a similar phenotype in mice. In what family of genes do you think these mutations occur?arrow_forwardThe most prominent mutation of ERBB2 in breast cancer is L755S. What kind of mutation is this? Is this a driver or passenger mutation? How to do you know?arrow_forward
- Consider a single base insertion mutation between the 3rd and 4th codons in a natural gene that encodes a protein 100 amino acids long. Is it more likely that the protein produced by this mutant allele will be shorter or longer than 100 amino acids long?arrow_forwardThe GAL4 expression system can be used to experimentally induce expression of a gene in a specific tissue at a specific time. You want to study the overexpression of Your Favorite Gene (YFG) in mouse ear development. However, if you overexpress this gene everywhere, the mouse is not viable past early embryo development. You have the following mouse lines with different mutations or transgenic constructs available. Which two will you cross together to answer your research questions? GAL4 with constitutive enhancer GAL4 with embryo enhancer GAL4 with ear enhancer yfg loss-of-function line YFG CDNA with UASG promoter YFG CDNA with constitutive promoterarrow_forwardA molecular geneticist hopes to find a gene gene in human liver cells that codes for an important blood clotting protein. He knows that the nucleotides sequence of a small part of the gene is GTGGACTGACA. briefly explain how to obtain the desired genearrow_forward
- 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?arrow_forwardAccording to the Central Dogma, genes are the blueprints for making proteins. Each gene (humans have 21,325) contains a single “coded message” of DNA bases (A, T, G, & C) attached in a specific order, which the cell “reads” to create an mRNA molecule that is then translated into protein. Knowing this, EXPLAIN how a SINGLE gene can make different proteins in different cells.arrow_forwardWhat is meant by the term attenuation? Is it an example of generegulation during transcription or translation? Explain your answer.arrow_forward
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