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目的了解贵州土家族、家人和白族人耳垂的群体遗传学特征。方法对1 212名双亲均为同一民族的贵州土家族、家人和白族人进行耳垂形态学活体观察,并根据Hardy-Weinberg定律计算耳垂的出现率和基因频率。结果贵州土家族、家人和白族人有耳垂的出现率分别为47.97%、76.21%、67.98%,显性基因频率分别为0.2787、0.5121、0.4341,隐性基因频率分别为0.7213、0.4879、0.5659。结论耳垂的遗传性状具有特异性,不同民族人群的耳垂遗传性状各不相同,存在民族、性别和地域差异。
Objective To understand the population genetic characteristics of lobe in Tujia, Luan family and Bai people in Guizhou province. Methods One hundred and thirteen parents with the same ethnicity in Guizhou Province were studied with living morphological changes of lobe. The earlobe appearance and gene frequency were calculated according to the Hardy-Weinberg law. Results The incidence rates of earlobe in Tujia, Li family and Bai people in Guizhou were 47.97%, 76.21% and 67.98% respectively. The dominant gene frequencies were 0.2787, 0.5121 and 0.4441 respectively. The frequencies of recessive genes were 0.7213, 0.4879 and 0.5659, respectively. Conclusions The genetic characteristics of earlobe are specific. The genetic characteristics of different lobe of earlobe vary among ethnic groups. There are ethnic, gender and geographical differences.