Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 35, Problem 17TYK
Summary Introduction
Introduction: The ABC hypothesis of flower development demonstrates the presence of three gene classes. These three classes of genes are involved in regulating the development of floral organs. These genes are referred to as classes A, B, and C genes. The interactions between these genes induce floral organ development.
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Students have asked these similar questions
Using the 'ABC model' of floral development, what would you expect the flowers of a mutant plant to look like if both A & B gene function had been destroyed?
What types of flower structures would you expect to see in whorls 1 through 4 of a mutant plant that failed to produce both class A and class B gene products?
a. Carpels, stamens, stamens, carpels
b. Sepals, sepals, carpels, carpels
c. Sepals, sepals, sepals, sepals
d. Carpels, carpels, carpels, carpels
in flowering control of plant, describe a situation wherein there are mutations in at least one or all of the genes responsible for control of the floral development.
Chapter 35 Solutions
Study Guide for Campbell Biology
Ch. 35 - Prob. 1IQCh. 35 - Prob. 2IQCh. 35 - Prob. 3IQCh. 35 - Prob. 4IQCh. 35 - Prob. 5IQCh. 35 - Prob. 6IQCh. 35 - Plant biologists use CRISPR-Cas technology to...Ch. 35 - Review the role of microtubules in the orientation...Ch. 35 - The following diagram depicting the ABC hypothesis...Ch. 35 - How does the indeterminate growth pattern of...
Ch. 35 - Prob. 2SYKCh. 35 - Which of the following is not a reason that...Ch. 35 - Prob. 2TYKCh. 35 - Prob. 3TYKCh. 35 - Prob. 4TYKCh. 35 - Prob. 5TYKCh. 35 - Prob. 6TYKCh. 35 - Prob. 7TYKCh. 35 - Which of the following is not a primary meristem?...Ch. 35 - Prob. 9TYKCh. 35 - Prob. 10TYKCh. 35 - Prob. 11TYKCh. 35 - You are a companion cell in an angiosperm. What...Ch. 35 - Prob. 13TYKCh. 35 - Prob. 14TYKCh. 35 - Prob. 15TYKCh. 35 - The results from genetic studies of which of the...Ch. 35 - Prob. 17TYKCh. 35 - Prob. 18TYK
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- The ABCDE Model of flower development dictates the combination of transcription factors require to initiate each whorl of a flower. Based on the diagram below, what would happen if: Carpels and ovules Sepal Petal Stamen 2 4 Whorl A Genes E 25-40 The ABCDE model of floral organ determination in Arabidopsis In addition to the A-, B-, and C-function genes of the ABC model, this model includes two additional gene classes, D and E. In the ABCDE model, class A + E genes specify sepals; class A + B + E, petals; class B +C +E, stamens; class C + E, carpels; and class C+ D + E, ovules. 1. Gene D was non-functional: 2. Gene E was non-functional: 3. Only Gene A was functional: 4. Gene B and E were non-functional: 5. Only Gene A and Gene E were functional: Hint: If Gene A was non-functional the flower would have no sepals or petals, it would be composed of only stamens and carpels.arrow_forwardExplain how (a) the absence of class B gene expression produces the flower structures seen in class B mutants (see Figure 22.15c) and (b) the absence of class C gene expression produces the structures seen in class C mutants (see Figure 22.15d).arrow_forwardPlease answer question 15arrow_forward
- What will be the flower structure of a plant in which expression of the following genes is inhibited in the specified whorls? a. Expression of class B genes is inhibited in the second whorl, but not in the third whorl. b. Expression of class C genes is inhibited in the third whorl, but not in the fourth whorl. c. Expression of class A genes is inhibited in the first whorl, but not in the second whorl. d. Expression of class A genes is inhibited in the second whorl, but not in the first whorl.arrow_forwardPlease answer question 16arrow_forwardYou are a developmental geneticist and perform a mutagenesis screen in Arabidopsis looking for floral organ mutants. You identify a mutant phenotype that has the following organ arrangement, beginning in whorl 1: Sepal-Sepal-Carpel-Carpel Which class of floral identity genes has been mutated? A-B double mutant O A O SEPALLATA B сarrow_forward
- What are phase changes in plant development? What two groups of genes control the formation of the flower? What is the ABC hypothesis?arrow_forwardhelparrow_forwardUsing just the 'ABC model' of floral development what would you need to change in terms of genes or gene expression to get male only flowers, but still have 3 different floral whorls in total? Then what would you need to change to get female flowers and again have three different floral whorls in total?arrow_forward
- Under which of the following conditions would pollen from an S2S5 plant successfully pollinate an S1S5 flower? a. Using pollen from a carpelate flower to fertilize a staminate flower would be successful. b. If the plants used gametophytic self-incompatibility, half of the pollen would be successful. c. If the plants used sporophytic self-incompatibility, half of the pollen would be successful. d. Pollen from an S2S5 plant can never pollinate an S1S5 flower.arrow_forwardRefer to the figure. a. What gene mutation(s) will result in the loss of production of the sepals? b. What gene mutation(s) will result in the loss of production of the petals? c. What gene mutation(s) will result in the loss of production of the stamens? d. What gene mutation(s) will result in the loss of production of the carpels?arrow_forwardexplain the following:P→ Parental generation.G → Gametes.F1→ First filial generation.F2→ Second filial generationGenotype (F2 (Phenotype (F2) I chose Stem lengtharrow_forward
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