Reiss M
University of Dresden, Germany.
Ann Hum Biol. 1999 Jan-Feb;26(1):39-48. doi: 10.1080/030144699282967.
Hand-clasping refers to the preferential tendency for individuals to clasp the hands together. This paper reviews the previous literature on family data and twins, and reports new data. In this study about 55% of the population are left-hand-claspers, 44% are right-hand-claspers, and the remaining 1% report that they have no preference or are indifferent. Familial data suggest that hand-clasping may be under genetic control: although the data do not fit any straightforward recessive or dominant Mendelian model, they are compatible with the type of model invoking fluctuating asymmetry which has been used to explain the inheritance of handedness and arm-folding. It is possible that hand-clasping, as for example arm-folding, may be an idiosyncrasy due to or influenced by physical bilateral differences in the hands. All data together are suggestive of a genetic basis, although environmental influences are also evident.
双手交叉习惯是指个体将双手交叉在一起的偏好倾向。本文回顾了之前关于家族数据和双胞胎的文献，并报告了新的数据。在这项研究中，约55%的人群是左手交叉型，44%是右手交叉型，其余1%表示他们没有偏好或无所谓。家族数据表明，双手交叉习惯可能受基因控制：尽管这些数据不符合任何简单的隐性或显性孟德尔模型，但它们与用于解释利手和手臂交叉遗传的波动不对称模型类型相符。双手交叉习惯可能像手臂交叉一样，是由于手部身体双侧差异导致或受其影响的一种特质。所有数据共同表明存在遗传基础，尽管环境影响也很明显。
