Variability within Down's syndrome (trisomy-21): empirically observed sex differences in IQs.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D012737:Sex Factors; D013195:Stanford-Binet Test; D014314:Trisomy