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作者于１９９６年在内蒙古调查了汉、回、蒙古族５项人类遗传学经典指标（拇指类型、环食指长、扣手、交叉臂、惯用手）。研究结果显示：（１）３个民族间拇指类型、扣手出现率存在显著性差异，交叉臂、惯用手出现率则无显著性差异，环食指长出现率蒙—汉、蒙—回间存在显著性差异；（２）拇指类型、扣手、惯用手出现率无性别间差异，环食指长出现率男女间存在显著性差异；（３）惯用手与扣手、惯用手与交叉臂间存在明显的相互关系，交叉臂与扣手之间则无关；（４）与国外人群比较，３个民族环指长出现率高，交叉臂Ｒ型出现率较高，扣手Ｒ型出现率较低，惯用手Ｌ型出现率高于印度的一些群体。
In 1996, the author investigated five classic Mongolian human genetics indexes (type of thumb, index finger, claw, cross arm and dominant hand) in Inner Mongolia. The results showed that: (1) There was a significant difference in thumb type and rate of hand clasping among the three ethnic groups, but there was no significant difference in the appearance rate of the cross arm and dominant hand between the Mongol - Han and Mongolia - Significant difference; (2) There was no significant difference in the appearance rate of the thumb type, the deduction hand and the dominant hand between the male and the female; (3) The dominant hand and the hand, the hand and the cross arm were existed (4) Compared with the overseas population, the appearance rate of ring finger of three ethnic groups is high, the occurrence rate of R type of cross arm is higher, and the appearance rate of R type of clasp is lower , The prevalence of dominant hand L type than some groups in India.