title: Homozygous duplication on long arm of chromosome pair no. 1.
mesh_terms: D000293:Adolescent; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002900:Chromosomes, Human, 1-3; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D007621:Karyotyping; D008297:Male; D010375:Pedigree