Roseman Charles C, Weaver Timothy D
Department of Anthropology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA.
Bioessays. 2007 Dec;29(12):1185-8. doi: 10.1002/bies.20678.
Evolutionary investigations of human crania typically take a limited view of cranial diversity as they discount the possibility that human cranial variation could simply be due to the effects of random genetic drift, gene flow and mutation in favor of natural selection and developmental changes. Natural selection alone cannot explain similarities between patterns of cranial and molecular diversity observed in humans. It appears that the amount of phenotypic variance in the human cranium decreases at the population level as a function of distance from Sub-Saharan Africa much in the same way as observed for human molecular data.
对人类颅骨的进化研究通常对颅骨多样性持有限的观点，因为它们忽视了人类颅骨变异可能仅仅是由于随机遗传漂变、基因流动和突变的影响，而倾向于自然选择和发育变化。仅自然选择无法解释人类中观察到的颅骨和分子多样性模式之间的相似性。人类颅骨的表型变异量似乎在种群水平上随着与撒哈拉以南非洲距离的增加而减少，这与人类分子数据的情况非常相似。
