[Variability of the C-segment sizes of chromosomes 1, 9, 16 and Y in the human chromosome set].
The investigation of chromosome polymorphism by quantitative methods is a rather hard task. The manual method for measuring C-segments of chromosomes 1, 9, 16 and Y in man is suggested, which is not difficult, being reasonably precise for the population research. Metaphases of the average level of chromosome condensation were taken for analysis. Only the C-segments were measured without measuring chromosomes. The negative chromosome image was 4000-fold magnified, compared to the chromosome natural size, and the boundaries of C-segments of each chromosome were five-fold dotted on a sheet of paper specially printed for this purpose. C-segments were measured by magnifying glass with 0.025 mcm scale unit. For every individuum, C-segments were measured in 5-7 cells only. The data are presented on the estimation of measurement errors and on individual (intercellular) and population (interindividual) variations of C-segments of chromosomes.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002900:Chromosomes, Human, 1-3 / Q000648:ultrastructure*; D002902:Chromosomes, Human, 16-18 / Q000648:ultrastructure*; D002906:Chromosomes, Human, 6-12 and X / Q000648:ultrastructure*; D014644:Genetic Variation; D005828:Genetics, Population; D006801:Humans; D008297:Male; D012730:Sex Chromosomes / Q000648:ultrastructure*; D014998:Y Chromosome / Q000648:ultrastructure*
Variabel'nost' razmerov C-segmentov khromosom 1, 9, 16 i Y v khromosomnom nabore cheloveka.