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Originally published as Genetics Published Articles Ahead of Print on June 8, 2005.
Genetics, Vol. 170, 2027-2030, August 2005, Copyright © 2005
doi:10.1534/genetics.104.039990
A 1927 Study Supports a Current Genetic Model for Inheritance of Human Scalp Hair-Whorl Orientation and Hand-Use Preference Traits
Amar J. S. Klar1
Developmental Genetics Section, Gene Regulation and Chromosome Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201
1 Address for correspondence: Gene Regulation and Chromosome Biology Laboratory, NCI-Frederick, 7th St., Bldg. 539, P. O. Box B, Frederick, MD 21702-1201.
E-mail: klar{at}ncifcrf.gov
The basis of right- vs. left-hand-use preference in humans has been debated for a long time. Culturally learned, birth stress, and biologically specified causes are the prominent etiologies under consideration. A 2003 (KLAR 2003) study reported a correlation between a person's preferred hand and the scalp hair-whorl orientation developed on the head. By reinterpreting results of a 1927 (SCHWARZBURG 1927) study on the genetics of the hair-whorl trait, support for a recent single gene, two-allele "random-recessive model" for both hair-whorl orientation and handedness trait inheritance is demonstrated.
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