C-band polymorphism in human chromosome no. 6.

Chromosome analysis of G-banded cells from 92 individuals consecutively referred to the Cytogenetics Laboratory show that the paracentromeric band in the short arm (6p11), which stains negatively with G-banding and darkly with C-banding, shows a marked increase in size in about 9% of chromosome no. 6. The results of this study and those from a family in which two variants of chromosome no. 6 are segregating are compatible with a Mendelian pattern of inheritance.