title: The evolution of heteromorphic sex chromosomes.
authors.affiliation: Biology Department, Emory University, Atlanta, GA 30322.
authors.forename: J C
authors.initials: JC
authors.lastname: Lucchesi
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004330:Drosophila / Q000235:genetics; D005260:Female; D007621:Karyotyping; D008297:Male; D012732:Sex Determination Analysis; D014960:X Chromosome; D014998:Y Chromosome