Peculiar mosaicism 47,XYY/48,XYYY/49,XYYYY in man.
The chromosome analysis in a 9 years-old boy showed the presence of three cell lines : 47,XYY (28%) ; 48,XYYY (68%); 49,XYYYY (4%). Since the most frequent cells bear three Y chromosomes and the karyotype of the propositu's father is normal, it is suggest that the propositus arose from an YYY sperm and that the observed mosaicism originated from a subsequent postzygotic non-disjunction.
D002648:Child; D002871:Chromosome Banding; D003878:Dermatoglyphics; D006801:Humans; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D010641:Phenotype; D011596:Psychomotor Disorders / Q000235:genetics; D012729:Sex Chromosome Aberrations; D012730:Sex Chromosomes; D014997:XYY Karyotype; D014998:Y Chromosome