Q-band polymorphism in Chinese populations--a comparison between the Han and the Li ethnic groups.

Using QFQ banding technique, the Q-band polymorphism of two Chinese ethnic groups is investigated. The data are based on the study of 100 individuals of the Han group and 50 individuals of the Li group of Hainan Island. The results reveal that the QFQ bands of these two groups are basically similar with the exception of the 21p11 band of chromosome 21 which shows significant difference. The relative length of the Y chromosome in the Li group is greater than that in the Han group. Statistical analysis indicate that the distribution of polymorphic Q bands in the populations samples is consistent with the expectations of the Hardy-Weinberg Principle.