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