Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 17.5, Problem 2CC
MAKE CONNECTIONS → Individuals heterozygous for the sickle-cell allele are generally healthy but show
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5
. The production of pigment in the outer layer of seedsof corn requires each of the three independently assorting genes A, C, and R to be represented by at leastone dominant allele, as specified in Problem 64. Thedominant allele Pr of a fourth independently assortinggene is required to convert the biochemical precursorinto a purple pigment, and its recessive allele pr makesthe pigment red. Plants that do not produce pigmenthave yellow seeds. Consider a cross of a strain of genotype A/A ; C/C ; R/R ; pr/pr with a strain of genotypea/a ; c/c ; r/r ; Pr/Pr.a. What are the phenotypes of the parents?b. What will be the phenotype of the F1?c. What phenotypes, and in what proportions, willappear in the progeny of a selfed F1?d. What progeny proportions do you predict from thetestcross of an F1?
4e. You also study the expression of 3 different mutants for this gene. For each mutant answer the
following:
Does this mutation change the sequence of the protein produced? Why or why not?
If it does change the sequence of protein be sure to write out the new sequence.
If it does not change the protein sequence, what effect (if any) would you expect it
to have on expression of the gene?
1
20
ORI
40
60
5'..TTCGAGCTCTCGTCGTCGAGATACGCGATGATATTACTGGTAATATGGGGATGCACTATC...3’
3'...AAGCTCGAGAGCAGCAGCTCTATGCGCTACTATAATGACCATTATACCCCTACGTGATAG...5’
promoter
i. Mutant A has a single base pair substitution with the T/A being replaced with C/G base pair at
position 35 (position denoted by the * in the sequence above).
ii. Mutant B has a 2 G/C pairs inserted between position 19 and 20 (position denoted by the ^ in
the sequence above).
Chapter 17 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 17.1 - Prob. 1CCCh. 17.1 - What polypeptide product would you expect from a...Ch. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.2 - MAKE CONNECTIONS In a research artide about...Ch. 17.2 - What enables RNA polymerase to start transcribing...Ch. 17.2 - Prob. 3CCCh. 17.3 - Prob. 1CCCh. 17.3 - How is RNA splicing similar to how you would watch...Ch. 17.3 - Prob. 3CC
Ch. 17.4 - What two processes ensure that the correct amino...Ch. 17.4 - Prob. 2CCCh. 17.4 - Prob. 3CCCh. 17.4 - Prob. 4CCCh. 17.4 - WH AT IF? In eukaryotic cells, mRNAs have been...Ch. 17.5 - What happens when one nucleotide pair is lost from...Ch. 17.5 - MAKE CONNECTIONS Individuals heterozygous for the...Ch. 17.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 17 - Describe the process of gene expression, by which...Ch. 17 - What are the similarities and differences in the...Ch. 17 - What function do the 5' cap and the poly-A tail...Ch. 17 - Prob. 17.4CRCh. 17 - What will be the results of chemically modifying...Ch. 17 - In eukaryotic cells, transcription cannot begin...Ch. 17 - Which of the following is not true of a codon? (A)...Ch. 17 - The anticodon of a particular tRNA molecule is (A)...Ch. 17 - Which of the following is not true of RNA...Ch. 17 - Which component is not directly involved in...Ch. 17 - Using Figure 17.6, identify a 5' 3' sequence of...Ch. 17 - Prob. 7TYUCh. 17 - Would the coupling of the processes shown in...Ch. 17 - Prob. 9TYUCh. 17 - Prob. 10TYUCh. 17 - Prob. 11TYUCh. 17 - Prob. 12TYUCh. 17 - Prob. 13TYU
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- Discuss Concepts Many human diseases are caused by recessive alleles that are not expressed in heterozygotes. Some people think that eugenicsthe selective breeding of humans to eliminate undesirable genetic traitsprovides a way for us to rid our populations of such harmful alleles. Explain why eugenics cannot eliminate such genetic traits from human populations.arrow_forwardQ. what would you predict to observe among the offspring of the following cross? A Drosophila line containing ey-GAL4 is crossed to a line containing UAS-GFP, actin-GAL80.arrow_forwardAaBbCc x AaBbcc How would you characterize this kind of relationship between the genes: A-B- (gray); A-bb (yellow); aaB- (black); aabb (cream) The CC and Cc genotypes allow color according to the expression of the A and B alleles. However, the cc genotype results in albino rats regardless of the A and B alleles presentarrow_forward
- Q. The nuclear membrane disintegrates late in prophase of mitosis in most eukaryotic cells. Once the membrane is reformed in telophase in a daughter cell, several components of gene expression might therefore be “caught” out in the cytoplasm when they would otherwise only ever be found inside the nucleus. Consider where the following components of gene expression are made and where they function. Which component is normally never found in the cytoplasm outside the nucleus? spliced intron RNA polymerase snRNA DNA polymerase A. 1, 2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1, 2, 3 & 4 are correctarrow_forward10. Fur colour in mice is an example of the effects of interaction between different genes. Wild type mice have agouti fur where the individual hairs are black with a yellow band producing the typical grey-like colour of agouti fur. Two different independently segregating genes are involved in the expression of coat colour: • A single gene with two alleles, A and a, determines the colour of the coat; Agouti (AA or Aa) is dominant over black (aa). • A different gene is required for the hair pigment to be synthesised and therefore expressed. When the dominant allele of this gene is present (C), pigment is produced and the agouti and black phenotypes can be expressed. A null allele (c, which produces an inactive form of the enzyme for pigment production) is recessive; when in the homozygous form (cc), no pigment is produced and the mice are albino. a) Write down the colour of the coat of mice with the following genotypes: Genotype Phenotype aaCc b) Consider the following cross: Parents…arrow_forward10. Fur colour in mice is an example of the effects of interaction between different genes. Wild type mice have agouti fur where the individual hairs are black with a yellow band producing the typical grey-like colour of agouti fur. Two different independently segregating genes are involved in the expression of coat colour: • A single gene with two alleles, A and a, determines the colour of the coat; Agouti (AA or Aa) is dominant over black (aa). • A different gene is required for the hair pigment to be synthesised and therefore expressed. When the dominant allele of this gene is present (C), pigment is roduced and the agouti and black phenotypes can be expressed. A null allele (c, which produces an inactive form of the enzyme for pigment production) is recessive; when in the homozygous form (cc), no pigment is produced and the mice are albino. a) Write down the colour of the coat of mice with the following genotypes: Genotype Phenotype aaCc b)Consider the following cross: Parents…arrow_forward
- Neep help ASAP. A red flowered plant was crossed with a blue flowered plant and produced all purple flowered plants. When the purple flowered plants were crossed with each other they produced 5 red plants, 5 blue plants, 20 deep purple plants, 20 light lilac plants, and 30 purple plants How many genes are involved in the color production? Assume that red color is caused by an A allele and blue color by a B allele and determine the likely genotype of the plants in the F2 generation.arrow_forwardI do not understand.arrow_forward>mutant1…arrow_forward
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