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Indeed, the debate regarding the cause(s) of handedness is a classic example of the controversy over the relative importance of "nature" (biological endowment) vs. "nurture" (environment and culture) on human behavior. ... Figure 1. Hair whorls. The counterclockwise parietal scalp hair-whorl on the left is of a NRH person,
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www.genetics.org/cgi/content/full/165/1/269
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Hair (scalp) whorls are a feature of human developmental biology, where there is a real void of literature (Ziering and Krenitsky, 2003). It has been noted previously that of all mammals, only humans have hair whorls, and that each individual must have a hair whorl (Wunderlich and Heerema, 1975).
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www.nature.com/jid/journal/v122/n4/full/5602296a.html
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1. Reversal of asymmetry in monozygotic twins expresses itself in varying degrees, ranging from complete situs inversus viscerum in conjoined twins to left-handedness or counter-clockwise hair-whorl in separate twins.
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www.biolbull.org/cgi/content/abstract/55/4/298
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Factors determining variation in human sexual preference are unknown. Since sexual preference is considered ... This realization provides one with an opportunity to unambiguously define the contribution, if any, of hair-whorl genetics to gay men’s sexual preference by inves-tigating the rotation of their hair whorls.
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www.ias.ac.in/jgenet/Vol83No3/251.pdf
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A 1927 study supports a current genetic model for inheritance of human scalp hair-whorl orientation and hand-use preference traits. Genetics. ...
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www.ncbi.nlm.nih.gov/pmc/articles/PMC1462764/
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In a recent study, Klar (2003) described the link between hair whorl orientation and handedness in humans. Klar (2003) suggested that human hair whorl ...
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linkinghub.elsevier.com/retrieve/pii/S0376635708001071
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Handedness is an attribute of human beings defined by their unequal distribution of fine motor skill between the left and right hands. ... Klar also related this to hair whorls, which is the direction the hair on the top of your head spins. 91% of the population had clockwise hair whorls, while 9% have counter clockwise...
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intro2psych.wordpress.com/2007/12/26/handedness-hair-wh...
intro2psych.wordpress.com/2007/12/26/handedness-hair-whorls-and-homosexuality/
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Learn why hand-made human hair women's wigs are better than Retail Wigs. How hand-made wigs and hair pieces are created. Wig making supplies and human hair available online. ... While this works to check the difference between synthetic hair and human hair, there is no test for checking which type of human hair was used...
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www.mhrw.com/retail_yourself.html
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Human handedness and scalp hair-whorl direction develop from a common genetic mechanism. Klar AJ Genetics 2003 Sep 165(1):269-76 [abstract on PubMed] ...
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f1000biology.com/article/id/1015499
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