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Results (a) Wild-type flower (b) Class A mutants (c) Class B mutants (d) Class C mutants Stamen Carpel Sepal- Petal- Whorl 1: Sepals Whorl 2: Petals Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Carpels Whorl 2: Stamens Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Sepals Whorl 3: Carpels Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Petals Whorl 3: Petals Whorl 4: Sepals Conclusion: In wild-type flowers: Gene Product Class A gene products - Class A + class B gene products- Class B+ class C gene products Class C gene products Flower whorl affected sepals in the 1st whorl petals in the 2nd whorl stamens in the 3rd whorl carpels in the 4th whorl 22.15 Analysis of homeotic mutants in Arabidopsis thalian led to an understanding of the genes that determine floral structures in plants.

Results (a) Wild-type flower (b) Class A mutants (c) Class B mutants (d) Class C mutants Stamen Carpel Sepal- Petal- Whorl 1: Sepals Whorl 2: Petals Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Carpels Whorl 2: Stamens Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Sepals Whorl 3: Carpels Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Petals Whorl 3: Petals Whorl 4: Sepals Conclusion: In wild-type flowers: Gene Product Class A gene products - Class A + class B gene products- Class B+ class C gene products Class C gene products Flower whorl affected sepals in the 1st whorl petals in the 2nd whorl stamens in the 3rd whorl carpels in the 4th whorl 22.15 Analysis of homeotic mutants in Arabidopsis thalian led to an understanding of the genes that determine floral structures in plants.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Explain 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).

Results (a) Wild-type flower (b) Class A mutants (c) Class B mutants (d) Class C mutants Stamen Carpel Sepal- Petal- Whorl 1: Sepals Whorl 2: Petals Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Carpels Whorl 2: Stamens Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Sepals Whorl 3: Carpels Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Petals Whorl 3: Petals Whorl 4: Sepals Conclusion: In wild-type flowers: Gene Product Class A gene products - Class A + class B gene products- Class B+ class C gene products Class C gene products Flower whorl affected sepals in the 1st whorl petals in the 2nd whorl stamens in the 3rd whorl carpels in the 4th whorl 22.15 Analysis of homeotic mutants in Arabidopsis thalian led to an understanding of the genes that determine floral structures in plants.
Transcribed Image Text:Results (a) Wild-type flower (b) Class A mutants (c) Class B mutants (d) Class C mutants Stamen Carpel Sepal- Petal- Whorl 1: Sepals Whorl 2: Petals Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Carpels Whorl 2: Stamens Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Sepals Whorl 3: Carpels Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Petals Whorl 3: Petals Whorl 4: Sepals Conclusion: In wild-type flowers: Gene Product Class A gene products - Class A + class B gene products- Class B+ class C gene products Class C gene products Flower whorl affected sepals in the 1st whorl petals in the 2nd whorl stamens in the 3rd whorl carpels in the 4th whorl 22.15 Analysis of homeotic mutants in Arabidopsis thalian led to an understanding of the genes that determine floral structures in plants.
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