XY system
English
editProper noun
edit- (biology) The system that determines the sex of humans, most other mammals, some insects (Drosophila), and some plants (Ginkgo), in which females have two of the same kind of sex cell (XX) and males have two distinct sex cells (XY).
Alternative forms
editSee also
editFurther reading
edit- XY sex-determination system on Wikipedia.Wikipedia