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Despite the significant associations between the short (S) allele of the serotonin transporter-linked polymorphic region (5-HTTLPR) and various psychiatric disorders, the S allele has persisted at relatively high prevalence in the human population worldwide. Based on findings of greater amygdala activity among S allele carriers both at rest and in response to threat-relevant stimuli, the S allele appears to be associated with greater vigilance for danger; therefore we hypothesized that the S allele would be associated with lower scores on risk-related traits. In order to test this hypothesis we assessed the 5-HTTLPR genotype of 81 individuals of European ancestry and tested for an effect of genotype on two dimensions of risk-related behavior: venturesomeness and impulsivity. Results revealed significantly lower venturesomeness and a trend toward lower impulsivity associated with the S allele. We speculate that relatively greater vigilance for and avoidance of danger may counteract the disease risk associated with the 5-HTTLPR S allele and contribute to its persistence at high prevalence in the human population. Replication in a larger sample is necessary in order to confirm these associations.

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. 3. Cardon , L. R. ( 2003 ): Practical barriers to identifying complex trait loci . In: Plomin , R. , DeFries , J. C. , Craig , I. C. , McGuffin , P. (eds), Behavioral Genetics in the Postgenomic Era

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., Horn, J. M. (1988) Human behavior genetics. American Review of Psychology 39 , 101-133. Human behavior genetics. American Review of Psychology 39

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. Mcgue , M. , Bouchard , T. J. , Iacono , W. G. , Lykken , D. T. ( 1993 ) Behavioral genetics of cognitive ability: a life-span perspective . In Plomin , R. , Mcclearn , G. E. (ed.) Nature, Nurture and Psychology 59 – 76

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Magyar Pszichológiai Szemle
Authors: Tamás Bereczkei, Petra Gyuris, Panna Köves and László Bernáth

. Animal Behavior. Mealy, L. (1985) Comment on the genetic similarity theory. Behavioral Genetics , 15, 571-574. Comment on the genetic similarity theory

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Gene Genie

A review of A Troublesome Inheritance: Genes, Race and Human History by Nicholas Wade. New York, NY: Penguin (2014), 288 pages. ISBN: 9780698163799

Journal of Evolutionary Psychology
Authors: Robert King and Raegan Murphy

, R., Defries , J. C. and Mcclearn , G. E. (1990): Behavior genetics: A primer. WH Freeman and Company , New York . Mcclearn G. E. Behavior genetics

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. E., Mc Guffin , P. (2005) Behavioral Genetics . Worth Publishers, New York Porter , R. H. (1987) Kin recognation and mediating mechanisms. In Crawford , Ch ., Smith , M., Krebs , D. (eds

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Plomin , R., De Fries , J. C., Mc Clearn , G. E., Mc Guffin , P. (2005) Behavioral Genetics. Worth Publishers, New York Rhodes , G., Zebrowitz , L. A., Clark , A., Kalick , S. M., Hightower

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dependence Behaviour Genetics 25 95 101 . N. Breslau M. Kilbey

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Wall, Z. V., Parker, J. G., Fadok, J. P., Darvas, M., Zweifel, L., Palmiter, R. D. (2011) A behavioral genetics approach to understanding D1 receptor involvement in phasic DA signaling. Mol. Cell. Neurosci. 46 , 21

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