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The Role of Genetic Drift in Shaping Modern Human Cranial Evolution : A Test Using Microevolutionary Modeling
Author
Source
International Journal of Evolutionary Biology
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-03-03
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The means by which various microevolutionary processes have acted in the past to produce patterns of cranial variation that characterize modern humans is not thoroughly understood.
Applying a microevolutionary framework, within- and among-population variance/covariance (V/CV) structure was compared for several functional and developmental modules of the skull across a worldwide sample of modern humans.
V/CV patterns in the basicranium, temporal bone, and face are proportional within and among groups, which is consistent with a hypothesis of neutral evolution; however, mandibular morphology deviated from this pattern.
Degree of intergroup similarity in facial, temporal bone, and mandibular morphology is significantly correlated with geographic distance; however, much of the variance remains unexplained.
These findings provide insight into the evolutionary history of modern human cranial variation by identifying signatures of genetic drift, gene flow, and migration and set the stage for inferences regarding selective pressures that early humans encountered since their initial migrations around the world.
American Psychological Association (APA)
Smith, Heather F.. 2011. The Role of Genetic Drift in Shaping Modern Human Cranial Evolution : A Test Using Microevolutionary Modeling. International Journal of Evolutionary Biology،Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-449294
Modern Language Association (MLA)
Smith, Heather F.. The Role of Genetic Drift in Shaping Modern Human Cranial Evolution : A Test Using Microevolutionary Modeling. International Journal of Evolutionary Biology No. 2011 (2011), pp.1-11.
https://search.emarefa.net/detail/BIM-449294
American Medical Association (AMA)
Smith, Heather F.. The Role of Genetic Drift in Shaping Modern Human Cranial Evolution : A Test Using Microevolutionary Modeling. International Journal of Evolutionary Biology. 2011. Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-449294
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-449294