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Previous Volume 354:7-9 January 5, 2006 Number 1 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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Scientists recently reached an important milestone in the understanding of genetic contributions to behavior. A new study demonstrated the role of a single gene in specifying sexual behavior in the fruit fly Drosophila melanogaster.¹ The findings prompt provocative thinking about the contribution of genetic factors to sexual orientation in humans, as well as about genes that might underlie a broader spectrum of human behaviors.

The investigators in the fruit-fly study, Demir and Dickson, focused on a gene called fruitless that has long been known to have strong effects on mating, fertility, and reproduction in fruit flies. The messenger RNA . . . [Full Text of this Article]

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Dr. Drayna is the acting chief of the Section on Systems Biology of Communication Disorders, National Institute on Deafness and Other Communication Disorders, Rockville, Md.

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