title: Giemsa-11 staining of chromosome 1: a newly described heteromorphism.
abstract: Sequential Giemsa-11 and C-band staining of the heterochromatic region of chromosome 1 from 30 unrelated individuals revealed a high degree of variability within this region, more than was identifiable with either stain alone. The Giemsa-11 stained material usually appeared as a single band of only slightly varying size within the heterochromatic region. The position of this band ranged from a location immediately adjacent to the centromere, to one farther along the long arm or at the junction of the C-band heterochromatin and euchromatin. Two individuals had a chromosome 1 with no detectable Giemsa-11 band but an average-size C-band. Two others with a large heterochromatic segment by C-banding had two Giemsa-11 positive bands. Additional studies of five members of one family were consistent with transmission of these hetermorphisms in codominant Mendelian fashion.
mesh_terms: D001399:Azure Stains; D002503:Centromere / Q000648:ultrastructure; D002900:Chromosomes, Human, 1-3 / Q000648:ultrastructure*; D005799:Genes, Dominant; D006570:Heterochromatin / Q000648:ultrastructure; D006801:Humans
chemical_list: D001399:Azure Stains; D006570:Heterochromatin