"Molecular Sex Determination" . "ZZ/ZW sex chromosome system" . "sex chromosome system" . "molecular basis of sex determination" . "sex determination" . "embryotic sex determination" . . "determines the sex" . "wider discussion of sex chromosome evolution" . "establishment of sex" . . "sexual chromosome" . "genetic sex" . "sex determination mechanism" . "male sex determination" . "sex-determining" . . "Sex determination" . "genotypic sex determination" . "unusual physical development" . "sex determination system" . "XX" . "Sex-determination_system#Chromosomal_determination" . "GSD" . "Sex-determination system" . "sex chromosomes" . "Sex-determination system#UV sex chromosomes" . "sexual characteristics" . "sex is determined" . "sex determination systems" . . "Sex-determination_system#Evolution" . "different sex chromosomes" . "determined" . . "sex-determination gene" . "Sex" . "determined genetically" . "sex-determining process" . "chromosomal sex determination" . . "Sex-determination system" . "therian" . "citizen's sex" . . "sex-determination genes X and Y" . "sex-determination system" . "genetically" . . "sex-determination" .