Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 19.3, Problem 1R
Summary Introduction
To review:
The organ identity genes and their action in combination to produce different organs in a developing plant.
Introduction:
The different whorls of the sepals, petals, stamens, and carpels are formed by the three classes of genes that are called the organ identity genes.
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Life: The Science of Biology
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- What is the genetic basis of the wrinkled phenotype of pea seed?arrow_forwardAs shown two types of buds. What are the two types and how do they differ?arrow_forwardWhat are the specialized cells—eggs within the ovules of the female parent and sperm cells within the pollen grains—that carry genes between generations?arrow_forward
- What will be the flower structure of a plant in which expression of the following genes is inhibited in the specified whorls? Q. Expression of class A genes is inhibited in the second whorl, but not in the first whorl.arrow_forwardWhat 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_forwardWhat are the advantages of breeding for disease-resistance in plants?arrow_forward
- What will be the flower structure of a plant in which expression of the following genes is inhibited in the specified whorls? Q. Expression of class B genes is inhibited in the second whorl, but not inthe third whorl.arrow_forwardMonoecious plants such as corn have either staminate or carpelate flowers. Knowing what you do about the molecular mechanisms of floral development, which of the following might explain the development of single-sex flowers? a. Expression of B-type genes in the presumptive carpel whorl will generate staminate flowers. b. Loss of A-type genes in the presumptive petal whorl will allow C-type and B-type genes to produce stamens instead of petals in that whorl. c. Restricting B-type gene expression to the presumptive petal whorl will generate carpelate flowers. d. All of the choices are correct.arrow_forwardConsider the following hypothetical gene a plant g&T produces a protein that impacts the stem length. There are two alleles for GT which produces long stem and tea little tea which results in short stint. Which of the following genome types above would have a different pheno type? And what would the phenotype be for the genotype?arrow_forward
- Flower development occurs in __________ according to _________. a. 3 whorls, maternal-effect genes b. 3 whorls, the ABC model c. 4 whorls, maternal-effect genes d. 4 whorls, the ABC modelarrow_forwarda. Does the pod of string bean appear to be a single carpel with one cavity containing seeds?b. Is the micropyle near the attachment of the seed to the pod of string bean?arrow_forwardHow two genes interact to produce seed colors in lentils?arrow_forward
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