Social class and frequency of XYY and XXY

Science  19 Dec 1975:
Vol. 190, Issue 4220, pp. 1228-1229
DOI: 10.1126/science.1198112


The karyotype and paternal social class were determined for 10,348 consecutively born males. No significant difference in paternal social class was associated with the occurrence of the XYY or the XXY karyotype. This argues against the suggestion that socioeconomic factors significantly affect the frequency of the nondisjunctional events leading to these chromosome abnormalities.