title: Morphologic variability of human chromosomes: polymorphism of constitutive heterochromatin.
abstract: Polymorphism of constitutive heterochromatin has been studied in a series of 30 normal individuals. A high frequency of C-band variants were observed. Twenty-six of the 30 individuals studied had at least one polymorphic variant of the C band. A total of 42 variants were recorded which were predominately localized near the centromeric heterochromatin block of chromosome 9 (26.19%), chromosome 16 (19.05%), and chromosome 1 (16.66%). These results are discussed together with the findings revealed by different studies.
mesh_terms: D002875:Chromosomes; D002900:Chromosomes, Human, 1-3; D002902:Chromosomes, Human, 16-18; D002906:Chromosomes, Human, 6-12 and X; D006570:Heterochromatin; D006801:Humans; D011110:Polymorphism, Genetic
chemical_list: D006570:Heterochromatin