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🔴 What is known about the biology of homosexuality?
Jon Perry - Genetics & Evolution Stated Casually Evolutionary biologist Bryan Gitschlag discusses what is and is not known about the biology of homosexual orientation.
LINKS FOR FURTHER READING
Here is Bryan's twitter thread (worth bookmarking)
https://twitter.com/BryanGitschlag/status/1593251988548235266
This paper shows there is not "A" gay gene, but that there are many genes (mutations/alleles) that influence sexual orientation: https://www.science.org/doi/10.1126/science.aat7693
This paper is one of many talking about evidence for the "antagonistic" hypothesis - the idea that a single gene can multiple unrelated effects (pleiotropy) and that some genes influencing homosexuality in men, have very different effects in women - the genes increase a woman's chances of having multiple offspring: https://www.nature.com/articles/s41562-021-01168-8
This paper studies the antagonistic hypothesis in fruit flies (it's found in them too!): https://royalsocietypublishing.org/doi/10.1098/rspb.2015.0429
This paper is a survey of the prevalence of homosexual orientation across cultures: https://link.springer.com/content/pdf/10.1007/s10508-019-01590-0.pdf?pdf=button
This paper reviews many studies on homosexual behavior (not necessarily orientation) in non-human animals: http://www.faculty.ucr.edu/~mzuk/Bailey%20and%20Zuk%202009%20Same%20sex%20behaviour.pdf
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