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Article

Genomic evidence consistent with antagonistic pleiotropy may help explain the evolutionary maintenance of same-sex sexual behaviour in humans.

Nature human behaviour - 1 Sept 2021

Zietsch Brendan P, Sidari Morgan J, Abdellaoui Abdel, Maier Robert, Långström Niklas, Guo Shengru, Beecham Gary W, Martin Eden R, Sanders Alan R, Verweij Karin J H

Abstract excerpt

Human same-sex sexual behaviour (SSB) is heritable, confers no immediately obvious direct reproductive or survival benefit and can divert mating effort from reproductive opportunities. This presents a Darwinian paradox: why has SSB been maintained despite apparent selection against it? We show that genetic effects associated with SSB may, in individuals who only engage in opposite-sex sexual behaviour (OSB...

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Identifiers

PMID: 34426668
DOI: 10.1038/s41562-021-01168-8

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-07.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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