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Contact: Jaclyn Jansen
Cold Spring Harbor Laboratory

miRNAs Play a Key Role in Sexual Differentiation in the Fruit Fly

Caption: Cold Spring Harbor Laboratory researchers have found that miRNAs, short RNA molecules, are responsible for sexual differences in fruit flies. Shown here are testes from a male fruit fly where a hormone that controls a key miRNA has been inactivated. The abnormal testes fail to make sperm. They now produce sex determinants (shown in red) that are found in the ovaries of female flies.

Credit: D. Fagegaltier/ Cold Spring Harbor Laboratory

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