Decoding sex differences: how GABA shapes Drosophila behavior

Sexually dimorphic behaviors are fundamental to the biology of many species, including fruit flies and humans. These behaviors are regulated primarily by sex-specific neural circuits or sex-specific modulation of shared neuronal substrates. In fruit flies, GABAergic neurotransmission plays a critical role in governing sexually dimorphic behaviors, such as courtship, copulation, and aggression. This review explores the intricate roles of GABAergic neurons in these behaviors and focuses on how sex-specific differences in GABAergic circuits contribute to their modulation and execution. By examining these mechanisms in Drosophila, we reveal broader implications for understanding sexual dimorphism in more complex organisms.