Abstract
Following Goldschmidt''s findings in the gypsy moth, one might consider human homosexuals as intersexes; thus [male] homosexuals can be regarded as more or less feminized [male][male], or as real [male] sex intergrades, genetically [female], and morphologically retaining only the chromosome formula. In the sibling population of [male] homosexuals [male][male] should predominate, since a series of genotypic [female][female] would be hidden in the phenotypic [male][male]. A statistical analysis of the siblings of more than 1000 [male] homosexuals shows that the sex ratio of the siblings actually differs from normal in the direction of too many [male][male] If age is considered, viewing the older homosexual as more genuinely homosexual, the difference becomes even more pronounced. This "strongly suggests that many cases of homosexuality are hereditarily determined and are best explained by a genetic mechanism.".

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