Drosophila ebony mutants have altered circadian activity rhythms but normal eclosion rhythms.

Abstract excerpt

Drosophila ebony mutants exhibit a syndrome of morphological and behavioral phenotypes that include an abnormally dark body color and defects in visual and courtship responses. We now show that mutants carrying any one of five ebony alleles display complex and variable locomotor activity rhythms. Although in the most extreme cases activity is essentially aperiodic, many individuals express short- and/or...

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