Study of gay brothers may confirm X chromosome link to homosexuality, Science

Sexual Orientation Biologically Based

New Data on Birth Order in Homosexual Men and Women and a Reply to Vilsmeier et al. (2021a, 2021b)

PDF) Articulating Scientific Practice: Understanding Dean Hamer's “Gay Gene” Study as Overlapping Material, Social and Rhetorical Registers

PDF) Potential for homosexual response is prevalent and genetic

Born this way? Society, sexuality and the search for the 'gay gene', Genetics

Dean Hamer PhD — Study of Gay Brothers may Confirm X Chromosome

Full article: Articulating Scientific Practice: Understanding Dean Hamer's “ Gay Gene” Study as Overlapping Material, Social and Rhetorical Registers

Largest study of roles of genes in homosexual behavior found that genetics is responsible for perhaps a third of the influence on sexual orientation. But other factors also have an impact, including

Biology and sexual orientation - Wikiwand

New Study Sheds Light On Two Regions of DNA Linked to Male Homosexuality

References - Lesbian, Gay, Bisexual, Trans and Queer Psychology

A Linkage Between DNA Markers on the X Chromosome and Male Sexual Orientation