The Drosophila fruitless (fru) gene product Fru has been postulated to be a neural sex
determination factor that directs development of the central nervous system (CNS), thereby
producing male-typical courtship behaviour and inducing male-specific muscle,,,,,. Male-
specific Fru protein is expressed in small groups of neurons scattered throughout the CNS of
male, but not female, Drosophila,. Collectively, these observations suggest that Fru
'masculinizes' certain neurons, thereby establishing neural substrates for male-typical …

Fruitless specifies sexually dimorphic neural circuitry in the Drosophila brain … Fruitless
specifies sexually dimorphic neural circuitry in the Drosophila brain …