Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 39.2, Problem 2CC
WHAT IF? Ø If a plant has the double mutation err and ctr, and ein what is its triple-response
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a. draw the relevant plant chromosomes in both plants
b. explaint he two different ratios
12. Consider the following genetically controlled biosynthetic pathway in a hypothetical
plant:
gene A
gene B
gene C
Enzyme A
Enzyme B
Enzyme C
PO →
P1
P2
P3
Protein C
eme D
Assume that gene A controls the conversion of a white pigment, PO, to another white
pigment, P1; the dominant allele A codes for the enzyme necessary to catalyze this
conversion, but the recessive allele a codes for a defective enzyme (with no activity). Gene
B controls the conversion of the white pigment, P1, to a pink pigment, P2; again, the
dominant allele, B, produces the enzyme necessary for the P1 - P2 conversion, but the
recessive allele b produces an inactive product. The dominant allele, C, of a third gene codes
for an enzyme that catalyzes the conversion of the pink pigment, P2, to a red pigment. P3;
its recessive allele, c, produces an altered enzyme with no activity.
The dominant allele, D, of a fourth gene produces a gene product that completely inhibits the
activity of enzyme C; that is, it blocks the…
You are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a
mutagenesis screen to identify mutants in the photoperiod pathway. You conduct the screen and
find two different plants that show the same mutant phenotype. You then use a complementation
test. What is the predicted outcome of this test if both phenotypes are caused by mutations in
separate genes?
recover the wild type phenotype
overexpress the gene
O recover the mutant phenotype
Chapter 39 Solutions
Campbell Biology (11th Edition)
Ch. 39.1 - What are the morphological differences between...Ch. 39.1 - Cycloheximide is a drug that inhibits protein...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - WHAT IF? If a plant has the double mutation err...Ch. 39.2 - MAKE CONNECTIONS What type of feedback process is...Ch. 39.3 - If an enzyme in field-grown soybean leaves is most...Ch. 39.3 - WHAT IF? If a plant flowers in a controlled...Ch. 39.3 - MAKE CONNECTIONS Plants detect the quality of...Ch. 39.4 - Prob. 1CC
Ch. 39.4 - Prob. 2CCCh. 39.4 - Prob. 3CCCh. 39.5 - What are some drawbacks of spraying fields with...Ch. 39.5 - Chewing insects mechanically damage plants and...Ch. 39.5 - Many fungal pathogens get food by causing plant...Ch. 39.5 - WHAT IF? Suppose a scientist finds that a...Ch. 39 - What are two common ways by which signal...Ch. 39 - Is there any truth to the old adage, "One bad...Ch. 39 - Why did plant physiologists propose the existence...Ch. 39 - Plants that have acclimated to drought stress are...Ch. 39 - Prob. 39.5CRCh. 39 - Prob. 1TYUCh. 39 - Prob. 2TYUCh. 39 - Prob. 3TYUCh. 39 - How may a plant respond to severe heat stress? (A)...Ch. 39 - Level 2: Application/Analysis 5. The signaling...Ch. 39 - If a long-day plant has a critical night length of...Ch. 39 - Prob. 7TYUCh. 39 - DRAW IT Indicate the response to each condition by...Ch. 39 - Level 3: Synthesis/Evaluation 9. EVOLUTION...Ch. 39 - SCIENTIFIC INQUIRY A plant biologist observed a...Ch. 39 - SCIENCE. TECHNOLOGY, AND SOCIETY Describe how our...Ch. 39 - Prob. 12TYUCh. 39 - Prob. 13TYU
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- What would be the effect on flowering time of over-expressing VIN3 (i.e., 35S:VIN3) in a winter annual Arabidopsis plant grown adjacent to a summer annual wild type plant in long days under warm conditions? Assume that the plants germinate at the same time. In answering the question, describe the molecular mechanism that allows you to make this conclusion.arrow_forward4. (a) Please fill out the following table to describe the classic floral phenotypes of A, B, and C class homeotic mutants. The organ identities of the four whorls in a wild type Arabidopsis flower are filled out for you. Please fill out the rest of the table to indicate the organ identities in different whorls of the mutant flowers. ( Whorl 1 Whorl 2 Whorl 3 Whorl 4 Wild type sepals petals stamens carpels A class gene mutants B class gene mutants C class gene mutantsarrow_forward- 1 attachment If a pure line wheat plant with a colored kernel (geniotype = DDEE) is crossed to plant with white kernels (genotype = ddee) and the resulting. F1 plants are selfed, a modification of the dihybrid 9:3:3:1 ratio will be produced. What is the biochemical explanation for the genotypes: (a) D_E_ and (b) D_ee ? A. Presence of functional enzymes from both genotypes (a) and (b) B. Presence of functional enzymes from genes in (a) C. Absence of a functional enzyme from the D gene pair D. Presence of functional enzymes from genes in (a) and absence of a functional enzyme from the D gene pair in (b) E. None of the above.arrow_forward
- Wild type, rapid-cycling accessions of Arabidopsis, such as the Columbia (COL) lab line will flower 32 days after germination under long day conditions (with a critical photoperiod of 15 hours). What is the predicted flowering-time response (EARLY, LATE, SAME) of each experimental plant's genotype (Listed below) relative to the wild-type, rapid-cycling COL line - when both are grown from seed under the following environmental conditions. The possible flowering time responses are: EARLY, LATE, SAME., relative to the wild-type COL line grown in the conditions listed below.arrow_forwardExplain this to me please.arrow_forwardMake a key for this problem. Use these symbols to show the cross for the P generation, the Chapter 14: Mendel and the Gene Idea 10. Figure 14.5 in your text explains how to construct a Punnett square for a cros bet true-breeding plants with purple or white flowers. You are going to reproduce this Goeen use symbols instead of pictures. offspring in the Fi generation, and both the cross and the offspring in the F2 generati, the dicate the alleles for each individual as well as the gametes it produces and complete Punnett square. Key: P Generation F, Generation F2 Generation Genetics problems have their own vocabulary, and you will have difficulties in solving them unless you master the following terms. Define the terms and give an example of each using the following symbols: 11. P = purple flowers p = white flowers homozygous heterozygous genotype phenotype parental cross monohybrid cross dihybrid cross -4- Copyright © 2021 Pearson Education, Inc.arrow_forward
- 1. In a plant species, flower-colour is determined by the biochemical pathway shown below: E В C Colourless orange pink purple green Genes A, B, C, D, and E are independently assorting. The dominant alleles A, B, C and D encode enzymes that catalyse the corresponding reactions indicated above. The recessive alleles a, b, c and d are non- functional and do not produce active enzymes. The dominant E allele totally inhibits the action of gene D, while the recessive allele e has no effect. a) Determine the F1 and F2 phenotypes from a cross between AABBccDDEE and AABBCCDDee plants. What proportion of the offspring of an AABBCCDDEE x aaBBCcDdEe cross is expected to have coloured flowers? 2. In a species of beetles, individuals may be red, black, white or tan. Colour is controlled by a single gene with multiple alleles in a dominance series. Red (R) is dominant to black (Rb), black is dominant to white (RW) and white is dominant to tan (r) (R > RD > RW > r). Colour variation in this species…arrow_forwardGive (10) ten plants that are genetically modified and are already sold in rhe market and give the economic significance of these plants.arrow_forwardExplain well. Asaparrow_forward
- Don't use Ai and chatgpt Answer in step by step with explanation.arrow_forward1a.Discovery of genes controlling Gibberellic Acid (GA) synthesis and perception became very important during the Green Revolution, and remain important today. Why? Select one: a. Mutants with reduced GA levels are dwarfs. Many dwarf plants were important for the Green Revolution because the shorter plants can invest more energy into economically important parts like seeds (instead of stem length). b. Mutants with reduced GA levels are more resistant to herbivore damage (like caterpillars), increasing plant yields. c. Mutants with reduced GA levels allowed farmers to control fruit ripening more accurately. d. Mutants with reduced GA levels have increased photosynthesis 1b. What features are important for overall plant form? Select one: a. Iterative development and capillary action b. Iterative development and apical dominance c. Apical dominance and stomatal conductance d. Phyllotaxis and capillary actionarrow_forwardComplementation tests of recessive mutants a through f produced the data shown in the table below. "+" means wild-type phenotype; "-" means mutant phenotype. PSCO a b с 0 0 0 0 0 a e a f b + C + d e + + + + + - d e f A new mutant, g, is isolated and it fails to complement c. Which other mutant(s) would g also fail to complement? (Select all correct answers.) ++ f ++ + + -arrow_forward
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