The XXYY chromosome constitution. Deoxyribonucleic acid replication and the Xg blood group.
D000293:Adolescent; D001789:Blood Group Antigens; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004247:DNA; D005058:Eunuchism; D006801:Humans; D008297:Male
D001789:Blood Group Antigens; D004247:DNA