Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 23.3, Problem 3CC
MAKE CONNECTIONS Given that changes in morphology are often caused by changes in the regulation of gene expression, predict whether noncoding DNA is likely to be affected by natural selection. (Review Concepts 15.2 1 and 15.3 1.)
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Discuss the significance of mutations and explain the role of the environment in the evolutionary process. (Hint: Consider Lenski's study and what is demonstrated. Do not re-tell Lenski’s study)
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. a. If you found a zinc-finger domain (which facilitates DNA binding) in a newly identified gene,what kinds of hypotheses could you make aboutthe gene’s function?b. Suppose that this newly identified gene shares ahigh percentage of similarity throughout its lengthwith a previously characterized gene in the sameorganism. What does this fact suggest about the origin of the two genes? Would you categorize thesegenes as being: (i) homologous, (ii) paralogous, or(iii) orthologous? (More than one answer may apply.)
Chapter 23 Solutions
Campbell Biology in Focus
Ch. 23.1 - Describe an example from the fossil record that...Ch. 23.1 - Your measurements indicate that a fossilized skull...Ch. 23.1 - WHAT IF? What might a fossil record of life today...Ch. 23.2 - Explain the consequences of plate tectonics for...Ch. 23.2 - Prob. 2CCCh. 23.2 - What factors promote adaptive radiations?Ch. 23.2 - Prob. 4CCCh. 23.3 - Explain how new body forms can originate by...Ch. 23.3 - Why is it likely that Hox genes have played a...Ch. 23.3 - MAKE CONNECTIONS Given that changes in morphology...
Ch. 23.4 - How can the Darwinian concept of descent with...Ch. 23.4 - Prob. 2CCCh. 23 - Which factor most likely caused animals and plants...Ch. 23 - Adaptive radiations can be a direct consequence of...Ch. 23 - A researcher discovers a fossil of what appears to...Ch. 23 - A genetic change that caused a certain Hox gene to...Ch. 23 - A swim bladder is a gas-filled sac that helps fish...Ch. 23 - SCIENTIFIC INQUIRY Herbivory (plant eating) has...Ch. 23 - FOCUS ON EVOLUTION Describe how gene flow, genetic...Ch. 23 - FOCUS ON ORGANIZATION You have seen many examples...Ch. 23 - SYNTHESIZE YOUR KNOWLEDGE In 2010, the Soufriere...
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- How does the chromosomal genetic system in animals permit both precise control of gene content and expression in cells and an opportunity for enormous amounts of genetic variation?arrow_forwardFor each of the following examples, discuss whether the observed result is due to neutral mutations or mutations that have been acted on by natural selection, or both: A. When comparing sequences of homologous genes, differences in the coding sequence are most common at the wobble base (i.e., the third base in each codon). B. For a protein-encoding gene, the regions that encode portions of the polypeptide that are vital for structure and function are less likely to display mutations than other regions of the gene. C. When comparing the sequences of homologous genes, introns usually have more sequence differences than exons.arrow_forwardExplain why genetic maps are useful?arrow_forward
- Comparing DNA sequences in different species indicates that more DNA segments that do not code for protein have been conserved (unchanged) than protein- coding regions. These non-protein-coding regions areinterpreted as gene regulatory elements. Suggest why gene regulatory elements have not undergone many changes during the course of evolution.arrow_forwardBeadle and Tatum’s BEST contribution to how gene expression is understood can be summarized as what? A. One gene produces one protein. B. Independent assortment occurs. C. DNA is the genetic molecule. D. Information flows from DNA to RNA to protein.arrow_forwardPlease answer fastarrow_forward
- In detail explain what is gene expression and central dogmas of genetics? What are the steps involved?arrow_forwardIllustrate about the Map and sequence the genomes of several model organisms used in experimental genetics, including Escherichia coli, Saccharomyces cerevisiae, Caenorhabditis elegans, Drosophila melanogaster, and Mus musculus (mouse).arrow_forwardPlease ASAP> Thankuarrow_forward
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY