ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Chapter 10.1, Problem 1CC
MAKE CONNECTIONS Using what you know of gene expression in a cell, explain what causes traits of parents (such as hair color) to show up in their offspring. (See Concept 3.6 1)
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Why is the control of gene expression important for cells? Choose one:
It ensures the accurate replication of DNA.
It prevents mutations from occurring during transcription and translation.
• It regulates the synthesis of proteins necessary for cellular functions.
5.
This diagram illustrates regulation of the Pitx-1 gene, which is expressed in various cell types
• during certain stages of animal embryonic development. Answer the questions that follow:
Promoter
Coding Region
Pelvis
Olfactory
Jaw
Regulatory Segments
("Switches")
a. Which portion of this sequence gets transcribed and translated into a protein?
b. Which portion of this sequence underwent a deletion mutation in certain species of
freshwater stickleback fish?
Did that mutation have an impact on the amino acid sequence of the protein, when it was
expressed?
С.
d. If this switch underwent the same mutation in a turtle embryo, how would the turtle's
phenotype be impacted?
е.
Would this phenotypic change in the turtle likely be adaptive? Briefly explain.
Look up the definition of a translator. Which
component of the cell translates the genetic
code? Think about this carefully...
Chapter 10 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 10.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 10.1 - How does an asexually reproducing eukaryotic...Ch. 10.1 - WHAT IF? A horticulturalist breeds orchids, trying...Ch. 10.2 - Prob. 1CCCh. 10.2 - Prob. 2CCCh. 10.2 - Prob. 3CCCh. 10.2 - WHAT IF? A certain eukaryote lives as a...Ch. 10.3 - Prob. 1CCCh. 10.3 - WHAT IF? After the synaptonemal complex...Ch. 10.4 - Prob. 1CC
Ch. 10.4 - Prob. 2CCCh. 10 - A human cell containing 22 autosomes and a Y...Ch. 10 - Homologous chromosomes move toward opposite poles...Ch. 10 - If the DNA content of a diploid cell in the G1...Ch. 10 - Prob. 4TYUCh. 10 - Prob. 5TYUCh. 10 - Prob. 6TYUCh. 10 - Prob. 7TYUCh. 10 - Prob. 8TYUCh. 10 - Prob. 9TYUCh. 10 - Prob. 10TYU
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- VISUALIZE Sketch a roughly cuboidal cell preparing to divide. Indicate the orientation of the preprophase band and the site where the new cell walls of the daughter cells will form.arrow_forwardCONNECT Why is an understanding of gene regulation in eukaryotes crucial to an understanding of developmental processes? Explain your answerarrow_forward. In the plant Arabidopsis thaliana, a geneticist is interested in the development of trichomes (small projections). A large screen turns up two mutant plants (A and B) that have no trichomes, and these mutants seem to be potentially useful in studying trichome development. (If they were determined by single-gene mutations, then finding the normal and abnormal functions of these genes would be instructive.) Each plant is crossed with wild type; in both cases, the next generation (F1) had normal trichomes. When F1 plants were selfed, the resulting F2’s were as follows: F2 from mutant A: 602 normal; 198 no trichomes F2 from mutant B: 267 normal; 93 no trichomesa. What do these results show? Include proposed genotypes of all plants in your answer. b. Under your explanation to part a, is it possible to confidently predict the F1 from crossing the original mutant A with the original mutant B?arrow_forward
- Which of the following statament is NOT TRUE about gene expression? Lüffen birini seçin: O a. Gene expression is the process by which DNA directs the synthesis of proteins O b. During gene expression, the information encoded in genes is used to make specific polypeptide chains or RNA molecules. O c. The expression of genes that code for proteins includes two stages: replication and translation O d. Translation is the synthesis of a polypeptide using the information in the MRNA.arrow_forwardANSWER QUESTION C and EXPLAIN A protein was recently discovered to be located in the nucleus. However, it is uncertain whether this is a protein that permanently stays in the nucleus or a shuttling protein that stays most of the time in the nucleus. One way to resolve this question is to perform the following steps: • Fuse the cells expressing the fluorescently labeled protein in their nucleus with the cells that are not expressing it. • Treat the cells with an inhibitor of protein synthesis to prevent the synthesis of more labeled proteins. • Observe for fluorescence in the fused cell with two nuclei. c. Why is it important to stop the synthesis of more of the labeled proteins?arrow_forwardHow does the regulation of gene expression support continued evolution of more complex organisms? Cells can become specialized within a multicellular organism Organisms can conserve energy and resources Cells grow larger to accommodate protein production Both A and B.arrow_forward
- How do cells control gene expression? How do cell "switch" genes on/off? Draw a flow chart to match?arrow_forwardHow do changes in gene expression relate to cell differentiation and specialization? Does every human cell have the same DNA, RNA or proteins?arrow_forwardCreate a Venn diagram to compare and contrast the process of gene expression in Bacteria versus eukaryotes. Remember that “gene expression” can include any part of transcription or translation. Try to be as thorough as you can about what aspects of this process are similar between the two taxa, and what characteristics are distinct to only Bacteria or eukaryotes. Plase include a minimum of 15 items in the Venn diagram.arrow_forward
- What does this expression mean? DNA → RNA→ Protein A DNA first turns into RNA; then the RNA turns into a protein. B The information in a DNA molecule is used to make an RNA molecule; then the information in the RNA is used to build a protein. C A cell passes through a phase where it has only DNA, then only RNA, then only protein.arrow_forwardIn detail explain what is gene expression and central dogmas of genetics? What are the steps involved?arrow_forwardTranscription allows (a) greater regulation of gene expression (b) amplification of gene expression (c) more than one protein to be produced by a gene (d) both a and b (e) all of the abovearrow_forward
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