单卵双胞胎的用手习惯与出生顺序的关联

Association of handedness and birth order in monozygotic twins.

作者信息

Christian J C, Hunter D S, Evans M M, Standeford F M

出版信息

Acta Genet Med Gemellol (Roma). 1979;28(1):67-8. doi: 10.1017/s0001566000009351.

Abstract

In a random sample of 104 pairs of middle-class Caucasian, handedness-discordant twins six years of age or older, a significant relationship has been found between birth order and handedness in monozygotic twins, there being an excess of left-handed among first-born twins (P less than 0.01). No such relation has been found in dizygotic twins.

摘要

在一个由104对6岁及以上的中产阶级白人、左右手偏好不一致的双胞胎组成的随机样本中，已发现同卵双胞胎的出生顺序与左右手偏好之间存在显著关系，即头胎双胞胎中左撇子的比例过高（P小于0.01）。在异卵双胞胎中未发现这种关系。