TRIPLE STEM-LINE CHROMOSOMAL MOSAICISM IN DOWN'S SYNDROME (MONGOLISM).
D044383:Black People; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004314:Down Syndrome; D006801:Humans; D017348:Microscopy, Electron, Scanning Transmission; D009030:Mosaicism
CHROMOSOME ABNORMALITIES; MONGOLISM; NEGROES