EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 52.2, Problem 3R
Summary Introduction
To review:
The evolutionary reason for gene expression cascade, which controls species-specific mating behavior.
Introduction:
Male courtship behavior in Drosophila is an example of fixed action pattern, which does not change and it is species-specific. A single gene called double sex (dsx) controls the gene expression cascades involved in developing male and female anatomy. A different splicing of messenger ribonucleic acid (mRNA) results in different dsx products in males and females. Another single gene called fruitless (fru) controls the male courtship behavior where a female does not respond to male courtship behaviors of other species.
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