In Drosophila, expression of the yellow gene is needed for the formation of dark pigment in many

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In Drosophila, expression of the yellow gene is needed for the formation of dark pigment in many different tissues; without this expression, a tissue appears yellow in color. In the wings, the expression of the yellow gene is controlled by an enhancer located upstream of the gene’s transcription initiation site. In the tarsal claws, expression is controlled by an enhancer located within the gene’s only intron. Suppose that by genetic engineering, the wing enhancer is placed within the intron and the claw enhancer is placed upstream of the transcription initiation site. Would a fly that carried this modified yellow gene in place of its natural yellow gene have darkly pigmented wings and claws? Explain.

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Principles of Genetics

ISBN: 978-1119142287

7th edition

Authors: D. Peter Snustad, Michael J. Simmons

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