Population differences in finger-length ratios: Ethnicity or latitude?

Loehlin, John C., McFadden, Dennis, Medland, Sarah E. and Martin, Nicholas G. (2006) Population differences in finger-length ratios: Ethnicity or latitude?. Archives of Sexual Behavior, 35 6: 739-742. doi:10.1007/s10508-006-9039-1

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Author Loehlin, John C.
McFadden, Dennis
Medland, Sarah E.
Martin, Nicholas G.
Title Population differences in finger-length ratios: Ethnicity or latitude?
Journal name Archives of Sexual Behavior   Check publisher's open access policy
ISSN 0004-0002
Publication date 2006
Sub-type Article (original research)
DOI 10.1007/s10508-006-9039-1
Volume 35
Issue 6
Start page 739
End page 742
Total pages 4
Editor K. J. Zucker
Place of publication New York, United States
Publisher Springer
Collection year 2006
Language eng
Subject C1
321011 Medical Genetics
730218 Social structure and health
Abstract The relative length of the second and fourth fingers (the 2D:4D ratio) has been taken to be an indicator of prenatal exposure to testosterone, and hence possibly relevant to sexual orientation and other sex-differentiated behaviors. Studies have reported a difference in this ratio between Caucasian males in Britain and in the U.S.: higher average 2D:4D ratios were obtained in Britain. This raises the question of whether differences among different Caucasian gene pools were responsible or whether some environmental variable associated with latitude might be involved (e.g., exposure to sunlight or different day-length patterns). This question was explored by examining 2D:4D ratios for an Australian adolescent sample. The Australians were predominantly of British ancestry, but lived at distances from the equator more like those of the U.S. studies. The Australian 2D:4D ratios resembled those in Britain rather than those in the U.S., tending to exclude hypotheses related to latitude and making differences in gene pools a plausible explanation.
Keyword Psychology
4d Ratio
Finger lengths
Congenital adrenal-hyperplasia
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

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Created: Wed, 15 Aug 2007, 09:50:31 EST