Some genetic traits in Solomon Island populations. II. Hand clasping, arm folding, and handedness

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Abstract
Among 1,438 persons in four Solomon Island populations, handclasp showed no age, sex, or tribal differences. The percentage of R‐claspers (right thumb on top), 66.4, exceeded those previously reported for Caucasian and Mongoloid peoples and resembled those for Oceanic and African samples. Handclasp was associated with handedness but not with armfold; it showed no assortative mating and no simple form of inheritance. Armfold showed an age association (more R‐folders among the youngest children), but none with sex or tribe, no assortative mating, and no pattern of inheritance. Its frequency, 41.4%, resembled those of populations around the world. Left handedness, 2.8% over all four tribes, paralleled contact with Western culture.

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