However, 婴儿头型 is correlated with adults head shape


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送交者: Latino2 于 2008-02-26, 10:37:39:

回答: 第一篇要ID, 第二篇看了一下摘要,也是讨论婴儿头型的。 由 湘女 于 2008-02-26, 10:25:52:

这个是讨论遗传和环境对头型的影响, 头型的遗传率并不是特别高。

http://www.pnas.org/cgi/content/abstract/222389599v1

A reassessment of human cranial plasticity: Boas revisited

Corey S. Sparks * and Richard L. Jantz
*Department of Anthropology, Pennsylvania State University, 409 Carpenter Building, University Park, PA 16802; and Department of Anthropology, University of Tennessee, 250 South Stadium Hall, Knoxville, TN 37996

Edited by Henry C. Harpending, University of Utah, Salt Lake City, UT, and approved August 30, 2002 (received for review July 1, 2002)

In 1912, Franz Boas published a study demonstrating the plastic nature of the human body in response to changes in the environment. The results of this study have been cited for the past 90 years as evidence of cranial plasticity. These findings, however, have never been critiqued thoroughly for their statistical and biological validity. This study presents a reassessment of Boas' data within a modern statistical and quantitative genetic framework. The data used here consist of head and face measurements on over 8,000 individuals of various European ethnic groups. By using pedigree information contained in Boas' data, narrow sense heritabilities are estimated by the method of maximum likelihood. In addition, a series of t tests and regression analyses are performed to determine the statistical validity of Boas' original findings on differentiation between American and European-born children and the prolonged effect of the environment on cranial form. Results indicate the relatively high genetic component of the head and face diameters despite the environmental differences during development. Results point to very small and insignificant differences between European- and American-born offspring, and no effect of exposure to the American environment on the cranial index in children. These results contradict Boas' original findings and demonstrate that they may no longer be used to support arguments of plasticity in cranial morphology.





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