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《Tianjin Science & Technology》 2018-10
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Frequencies of the Petaloid Toenails of Chinese Han Nationality Population:An Investigation

YU Luman;ZHOU Yunyun;Institute of Rail Transit,Tongji University;  
Petaloid toenail is a physical trait,which is characterized by an additional tiny toenail on the small toe.The frequencies of the petaloid toenails of Chinese Han population among 23 provincial administration regions were investigated and analyzed by using stratified random sampling.Results showed that the sexual difference was only observed in Han ethnic group in He'nan province.The frequency of petaloid toenail was above 40%, in 11 provincial administration regions such as Anhui.The frequency of petaloid toenail was below 30%, in Heilongjiang province.The frequency of petaloid toenail was highest in the middle region of China,and reduced gradually towards southeast,southwest,northeast and northwest direction.
【CateGory Index】: Q983
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