Genetic regulation and pattern formation: A study of theyellowlocus inDrosophila melanogaster

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Abstract
SUMMARY: Many of theyellowalleles found inDrosophila melanogasterresult in a unique pattern of phenotypic expression. These patterns follow the morphologically distinct cell types of the cuticle, so that for one allele all the bristles of the head and thorax might be mutant, while most of the fly appears wild type. A comparison of many differentymutants demonstrates that theyellowphenotype is expressed independently in most if not all the different cell types which form the cuticle. Control of this expression appears to reside at theyellowlocus itself.

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