Investigation of 142 mosaic mongols and mosaic parents of mongols; cytogenetic analysis and maternal age at birth.
D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000196:embryology / Q000235:genetics*; D005260:Female; D005347:Fibroblasts / Q000648:ultrastructure; D006801:Humans; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D008423:Maternal Age; D008938:Mitosis; D009030:Mosaicism; D010290:Parents; D015053:Zygote