Abstract
A prevalence study of chromosome abnormalities in a Danish male population of 3,840 conscripts showed a total prevalence for chromosome abnormalities of 4.6Y per 1,000. Only males with small testes, males with a stature >181 cm and mentally retarded males were examined. The prevalence can thus only be expected to be complete for sex chromosome abnormalities and chromosome abnormalities in persons with a mental retardation.The prevalence of males with 47, XXY was 0.78 per 1,000 and males with 47, XYY as well as males with 47, XY, f21 were round in 1.30 per 1,000.The prevalence of autosomal marker chromosomes was 5.4 per 1,000, and the prevalence of large Y was 3.9%.
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