QUANTITATIVE-ANALYSIS OF CENTROMERIC HETEROCHROMATIN POLYMORPHISM IN HUMAN-CHROMOSOMES

  • 1 January 1977
    • journal article
    • research article
    • Vol. 13  (12) , 2195-2200
Abstract
The measurement of C[constitutive heterochromatin]-segment length in chromosomes 1, 9 and 16 of 7 individuals was carried out. The regression analysis was employed to study a change of the C-segment sizes in the process of mitotic chromosome condensation. Typical values of C-segment length for chromosomes 1, 9 and 16 are about 1.4, 1.1 and 0.8.mu., respectively. Among 7 individuals there were no 2 which had identical size of C-segments for all 3 chromosomes studied. In 6 individuals heteromorphism of C-segments was revealed. Visually detected heteromorphism may be expressed quantitatively as the ratio length of C-segments in homologous chromosomes.