Mosaicism.
D000293:Adolescent; D000328:Adult; D002648:Child; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000235:genetics; D008297:Male; D009030:Mosaicism