Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 31.5, Problem 1TYK
Summary Introduction
Introduction:
Producing clones implies to producing the same or identical copies of an adult plant. Plant cloning is done by asexual propagation. It is a widely used and very successful process for creating a new plant’s life. Through this process, gardeners can easily reproduce copies of the mother plant.
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In the early 1990s, Carolyn Napoli and her colleagues were working on petunias, attempting to genetically engineer a variety with dark purple petals by introducing numerous copies of a gene that encodes purple pigment in the flower petals (C. Napoli, C. Lemieux, and R. Jorgensen. 1990. Plant Cell 2:279–289). Their thinking was that extra copies of the gene would cause more purple pigment to be produced and would result in a petunia with an even darker hue of purple. However, much to their surprise, many of the plants carrying extra copies of the purple gene were completely white or had only patches of color. Molecular analysis revealed that the amount of mRNA produced by the purple gene was reduced 50-fold in the engineered plants compared with wild-type plants. Somehow, the introduction of extra copies of the purple gene silenced both the introduced copies and the plant’s own purple genes. Provide a possible explanation for how the introduction of numerous copies of the purple gene…
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Chapter 31 Solutions
Principles of Biology
Ch. 31.1 - Prob. 1BCCh. 31.1 - What advantages do flowering plants obtain by...Ch. 31.1 - Prob. 2CCCh. 31.1 - Prob. 3CCCh. 31.1 - Prob. 1TYKCh. 31.1 - What is a unique combination of reproductive...Ch. 31.2 - What inference can you draw from the observation...Ch. 31.2 - Prob. 1TYKCh. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CC
Ch. 31.3 - Prob. 1BCCh. 31.3 - Prob. 1TYKCh. 31.4 - Prob. 1CCCh. 31.4 - Prob. 1TYKCh. 31.5 - Prob. 1TYKCh. 31 - Where do the pollen grams of flowering plants...Ch. 31 - Prob. 2TYCh. 31 - Where would you find female gametophytes of a...Ch. 31 - Prob. 4TYCh. 31 - Prob. 5TYCh. 31 - Prob. 6TYCh. 31 - Prob. 7TYCh. 31 - Prob. 8TYCh. 31 - Prob. 9TYCh. 31 - Why are pollen grain walls composed of...Ch. 31 - Prob. 2CCQCh. 31 - Prob. 3CCQCh. 31 - Prob. 1CBQ
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