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Length of Y chromosome and activity in boys
Author(s) -
Nielsen Johannes,
Nordland Eva
Publication year - 1975
Publication title -
clinical genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 102
eISSN - 1399-0004
pISSN - 0009-9163
DOI - 10.1111/j.1399-0004.1975.tb01504.x
Subject(s) - permissive , danish , personality , developmental psychology , demography , psychology , medicine , biology , endocrinology , genetics , social psychology , philosophy , linguistics , sociology
In a cytogenetic‐psychological study of 47 school boys in special classes and 48 controls in normal classes in a Danish city no significant difference was found between the mean Y length. There were, however, four boys with enlarged Y among the 47 in special classes, compared with one of the 48 in the normal classes. We found a significant correlation between length of Y and level of activity with increase of level of activity correlated with increase of length of Y when both groups were taken together (P < 0.005). The mean activity score was 6.5 for the boys with Y/F 5 0.83, compared with 8.1 for those with Y/F 0.95 (P < 0.005). If the milieu is restrictive with poor understanding and support for the needs of a boy, a comparatively large Y with associated high level of activity might intensify the problems of such a boy. If the milieu is positive, understanding, permissive and with possibilities of channeling activity, the large Y associated with a high level of activity might be a positive factor in personality development and social adjustment. The present study shows certain tendencies confirming this.