ZW sex-determination system
CHROMOSOMAL SYSTEM THAT DETERMINES THE SEX OF OFFSPRING IN BIRDS, SOME FISH, SOME INSECTS AND CRUSTACEANS, AND SOME REPTILES
WZ sex-determination system; Z chromosome; W chromosome; ZW sex determination
The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects (including butterflies and moths), the schistosome family of flatworms, and some reptiles, e.g.