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No evidence for a correlation between behaviour and the size of the Y chromosome |
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| Authors: | Anton,Brø gger ,Trygve,Urdal ,Finn Brasch, Larsen Nils Johan, Lavik |
| Affiliation: | Genetics Laboratory, Norsk Hydro's Institute for Cancer Research, Oslo, Norway;Reitgjerdet Hospital, Trondheim, Norway;State Centre for Child and Adolescent Psychiatry, Oslo, Norway |
| Abstract: | Y chromosome variation has been studied in three groups of Norwegian males: 35 boys from an adolescent psychiatric hospital; 45 men from a hospital for hard-to-manage or dangerous, psychotic men; and 26 boys from two ordinary school classes. Y chromosomes with 1, 2, and 3 brightly fluorescing bands were found in all three groups. One boy carried a Y with no bands. The mean values of the Yf/Yq ratio were not significantly different in the three groups (Yf is the length of the distal, brightly fluorescing part of Yq). Two cases of XY/XYY mosaicism were found among the psychotic men. The study shows that the human species is polymorphic with regard to the size of the Y chromosome, i. e. the number of fluorescent bands in the long arm. No phenotypical manifestation of this polymorphism, particuIarly as regards behaviour, was found. |
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