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GENETIC ANALYSIS: AN INTEG. APP. W/MAS
2nd Edition
ISBN: 9781323142790
Author: Sanders
Publisher: Pearson Custom Publishing
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Chapter 7, Problem 21P
Raymond Rodriguez and colleagues demonstrated conclusively that
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If you isolated DNA from the ear and the tail of the same mouse, would you expect the DNA, isolated form the two tissue types, to be the same? Why? (2)
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Provide one difference between DNA replication in eukaryotes and prokaryotes with regards to their origin(s) of replication. (1)
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Consider the experiment conducted by Meselson and Stahl in which they used 14N and 15N in cultures of E. coli and equilibrium density gradient centrifugation. Draw pictures to represent the bands produced by bacterial DNA in the centrifuge tube before the switch to medium containing 14N and after one, two, and three rounds of replication in that medium. Use separate sets of drawings to show the bands that would appear if replication were (a) semiconservative; (b) conservative; (c) dispersive.
a) If you isolated DNA from the ear and the tail of the same mouse, would you expect the DNA, isolated from the two tissue types, to be the same? Why?
b) Provide one difference between DNA replication in eukaryotes and prokaryotes with regard to their origin (s) of replication.
Chapter 7 Solutions
GENETIC ANALYSIS: AN INTEG. APP. W/MAS
Ch. 7 - What results from the experiments of Frederick...Ch. 7 - 7.2 Explain why Avery, MacLeod, and McCarty’s in...Ch. 7 - 7.3 Hershey and Chase selected the bacteriophage...Ch. 7 - 7.4 Explain how the Hershey and Chase experiment...Ch. 7 - 7.5 One strand of a fragment of duplex DNA has the...Ch. 7 - 7.6 The principles of complementary base pairing...Ch. 7 - For the following fragment of DNA, determine the...Ch. 7 - 7.8 Figures present simplified depictions of...Ch. 7 - 7.9 Consider the sequence -ACGCTACGTC-.
What is...Ch. 7 - DNA polymerase III is the main DNA-synthesizing...
Ch. 7 - Explain how RNA participates in DNA replication.Ch. 7 - A sample of double-stranded DNA is found to...Ch. 7 - Bacterial DNA polymerase I and DNA polymerase III...Ch. 7 - Diagram a replication fork in bacterial DNA and...Ch. 7 - Prob. 16PCh. 7 - Which of the following equalities is not true for...Ch. 7 - List the order in which the following proteins and...Ch. 7 - Two viral genomes are sequenced, and the following...Ch. 7 - Matthew Meselson and Franklin Stahl demonstrated...Ch. 7 - Raymond Rodriguez and colleagues demonstrated...Ch. 7 - 7.22 Joel Huberman and Arthur Riggs used pulse...Ch. 7 - 7.23 Why do the genomes of eukaryotes, such as...Ch. 7 - Bloom syndrome (OMIM 210900) is an autosomal...Ch. 7 - 7.25 How does rolling circle replication (see...Ch. 7 - Telomeres are found at the ends of eukaryotic...Ch. 7 - A family consisting of a mother (I-1), a father...Ch. 7 - In a dideoxy DNA sequencing experiment, four...Ch. 7 - Prob. 29PCh. 7 - Using an illustration style and labeling similar...Ch. 7 - A PCR reaction begins with one double-stranded...Ch. 7 - Prob. 32PCh. 7 - Three independently assorting VNTR markers are...Ch. 7 - 7.34 A sufficient amount of a small DNA fragment...Ch. 7 - Prob. 35P
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- An alternative to semi-conservative replication is conservative replication in which the parent strands come apart only temporarily to serve as templates for synthesis of daughter strands but then come back together again as they were originally and the two new daughter strands then also form a duplex molecule. What single feature of the Meselsohn Stahl experiment allowed this conservative replication hypothesis to be rejected? (Hint:To answer this question you can consider the banding pattern produced on the cesium chloride density-gradient centrifugation following one round of replication in the Meselsohn Stahl experiment.)arrow_forwardI need explanation for the why the answer is correct? And why would the other options wrongarrow_forwardUsing the same experimental setup as in the original Meselson and Stahl experiment, predict the bands (heavy, light or intermediate) that you would observe after one round of replication if DNA polymerase replicated the bacterial genome by the conservative model of replication. Draw and explain your prediction.arrow_forward
- A scientist successfully analyzed a new micro-organism. Because this micro-organism contains double-stranded DNA as genetic material, Meselson-Stahl techniques was employed. The following shows the results of the experiment where L – light chain (14N) and H – heavy chain (15N).What is the mechanism of replication in this organism in the picture? Explain how you got the answer. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’. Accidentally, you forget to include dATP in the four reactions that contain a ddNTP. What is the sequence of the daughter strand produced from this sequencing activity? Show the process. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’. Accidentally, you forget to include dATP in the four reactions that contain a ddNTP. How many bands will appear in the lane containing ddATP? Show the process. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’.…arrow_forwardWhat was the only conclusion that John Cairns could draw from his 1963 paper "The bacterial chromosome and its manner of replication as seen by autoradiography" ? Replication in E. coli is bidirectional Replication in E. coli is discontinuous E. coli has a circular chromosome E. coli has a single origin of replicationarrow_forwarda) "Out of three E.coli DNA polymerases, DNA polymerases 3 has a high processivity and rate of polymerization and therefore better suited for replication of the genome" What is meant by processivity? how does the DNA polymerase 3 maintain high processivity? b) What is a replication fork ?. Give the protein/enzymes of a replication fork and describe their function?arrow_forward
- Why were Meselson and Stahl unable to distinguish between the dispersive and the semiconservative models following only one round of DNA replication?arrow_forwardThis is a three part question: Figure B in Box 4.1 illustrates the results of the Meselson-Stahl experiment after a single cycle of replication in 14N. (a) Explain the results they observed after two rounds of replication in 14N medium. (b) Draw out the expected results if a third round of replication were allowed in 14N medium. (c) Two other models for template-directed replication were considered as alternatives to semi-conservative replication. One of these was conservative replication, in which the parental strands were unpaired, replicated, then reannealed such that the parental strands stayed together and the newly synthesized strands were together. The second model was dispersive replication, in which one strand was used as the template for polymerization, then the polymerase switched to using the other strand as the template, and subsequently switched back and forth between the two strands until bother were fully replicated. Each of these models is ruled out by one of your…arrow_forwardhe Meselson and Stahl experiment provided conclusive evidence for the semiconservative replication of DNA in E. coli. What pattern of bands would they have observed in a CsCl gradient after one generation if replication was conservative? a heavy, a light and an intermediate band one heavy and one light band (no intermediate) one intermediate band one light band one heavy bandarrow_forward
- What observation in the Meslson and Stahl experiment to decipher the DNA replication model distinguishes the semi-conservative from the dispersive mode of replication? Explain.arrow_forwardYou are studying a colony of cells and determine that some of these cells have a mutated DNA polymerase I that results in loss of function of this enzyme. A) What will the effect of the mutation in DNA polymerase I be on DNA replication? In your answer make sure to describe what would be observed in the leading and lagging strand and explain your reasoning. B) Will this mutation in DNA polymerase I have an impact on another step in DNA replication? In your answer make sure to indicate whether DNA replication will be impacted or not. If it is not, explain why. If it is impacted, then describe the step that is impacted and name the molecule or enzyme involved.arrow_forwardYou conducted an experiment to determine the mechanism of DNA replication in the hypothetical organism Fungus mungus. Your data shows that synthesis of newly replicated DNA from F. mungus is discontinuous on both strands of the replication fork. Does this result support or not support the hypothesis that F. mungus replicates its DNA by the same mechanism as yeast? Briefly explain your answer.arrow_forward
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