title: ENLARGED SHORT ARM OF A SMALL ACROCENTRIC CHROMOSOME IN GRANDFATHER, MOTHER AND CHILD, THE LATTER WITH DOWN'S SYNDROME.
mesh_terms: D001132:Arm; D002648:Child; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002875:Chromosomes; D004314:Down Syndrome; D005826:Genetics, Medical; D006801:Humans; D009035:Mothers; D009154:Mutation
keywords: CHROMOSOME ABNORMALITIES; GENETICS, HUMAN; MONGOLISM; MUTATION