Turning on a single male-specific gene produces a female fruit fly that displays male courtship behaviors: chasing other females, tapping their abdomens and performing wing-beating love serenades. The results, published in the June 15 online edition of the journal Nature, show that a single gene can determine how females and males detect and respond differently to sexual cues.
’’In these experiments we see all the steps of the male courtship ritual you could physically expect a female fly to do,’’ says Bruce S. Baker, the Dr. Morris Herzstein Professor in Biology at Stanford and co-author of the study. ’’It’s a male’s behavioral circuitry in a female body.’’
Baker and Stanford graduate student Devanand S. Manoli and their collaborators at Brandeis and Oregon State universities focused on a gene known as fruitless-one of approximately 13,000 genes in the DNA of the common fruit fly, Drosophila melanogaster. The three laboratories had previously discovered that fruitless is the master gene controlling the male fruit fly’s elaborate six-step courtship ritual. Last year they showed that disabling the fruitless gene in a tiny group of cells in the brain of a male fruit fly was enough to prevent successful mating, by turning him into a bumbling, ineffective suitor.
Dawn Levy | EurekAlert!
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