this post was submitted on 01 Oct 2023
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[–] The_v@lemmy.world 3 points 1 year ago (1 children)

We likely will never know the "actual" numbers because it's a moving target.

Homosexuality is thought to be linked to higher fecundity of all the female relatives. As birth rates decline, a slightly higher fecundity will drive an increase in observed homosexuality/bisexuality as a percentage of the population.

[–] wit@lemmy.world 2 points 1 year ago* (last edited 1 year ago) (1 children)

Homosexuality is thought to be linked to higher fecundity of all the female relatives.

Do you have any source for this? I have never heard about this before..

[–] The_v@lemmy.world 2 points 1 year ago

From a population genetics standpoint, the amount of homosexuality around is a puzzle. Because homosexual individuals have negative fitness (aka they don't make many babies), they should be very rare if it's genetically linked. There has to be a counter-benefit to the genetic family to maintain them in the population.

Why it's important: If there is no counter-benefit, then homosexuality logically has no significant genetic component. It's all environmentally influenced.

Original study proposing the concept in for homosexual mens families.

https://royalsocietypublishing.org/doi/abs/10.1098/rspb.2004.2872

A few more recent ones discussing it.

https://link.springer.com/article/10.1007/s12110-017-9309-8

https://link.springer.com/article/10.1007/s10508-007-9191-2

https://www.sciencedirect.com/science/article/abs/pii/S1090513808000688

And the ladies.

https://link.springer.com/article/10.1007/s12110-017-9309-8