Abstract: ObjectiveTounderstand the population genetics of ear lobes of Tujia,Gejia and Bai populations in Guizhou province. MethodsA somatological survey on 1212 Tujia,Gejia ang Bai populations,The gene frequencies of ear lobes were calculation out according to the Hardy-Weinberg law.ResultsIncidence of earlobe were 47.97%,76.21%,67.98%.The frequency of dominant gene of ear lobes were 0.2787,0.5121,0.4341.and that of recessive gene were 0.7213,0.4879,0.5659 of Tujia,Gejia and Bai populations.b Conclusions The earlobe has specific genetic traits,The genetic traits of different ethnic groups. There are ethnic, gender and regional differences.

Key words: ear lobe, gene frequency, Tujia, Gejia, Bai, Guizhou