Chromosomal approach of children in mental retardation institutes.
D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000150:complications; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D012728:Sex Chromatin; D012730:Sex Chromosomes