title: The quantitative analysis of polymorphism on human chromosomes 1, 9, 16, and Y. I. Description of individual karyotypes.
abstract: This study was made to establish a stable quantitative characteristic of C segments on chromosomes 1, 9, 16, and Y in an individual karyotype that was reproducible in successive experiments. The C segment of these chromosomes were measured in successive cultures of cells from three males and the C segments of chromosomes 1, 9, and 16 in cells from three pairs of female monozygotic twins were measured. The results show that the absolute lengths of C segments tend to vary considerably with the cell samples analyzed, while the relative length, i.e., the length of a single C segment as a percentage of the total length of all C segments of the chromosomes being studied, is more stable and can be used for individual characteristics.
mesh_terms: D002900:Chromosomes, Human, 1-3 / Q000648:ultrastructure*; D002902:Chromosomes, Human, 16-18 / Q000648:ultrastructure*; D002906:Chromosomes, Human, 6-12 and X / Q000648:ultrastructure*; D005260:Female; D014644:Genetic Variation; D006570:Heterochromatin; D006801:Humans; D007621:Karyotyping; D008297:Male; D011247:Pregnancy; D012730:Sex Chromosomes / Q000648:ultrastructure*; D014430:Twins, Monozygotic; D014998:Y Chromosome / Q000648:ultrastructure*
chemical_list: D006570:Heterochromatin