Search Results for: homosexuality

Homosexuality, epigenetics, and zebras

The recent article in the Quarterly Review of Biology has some good points. It does not argue that homosexuality is adaptive, which would be silly. It does not argue for Lamarckian epigenetics, which would also be silly. I should also … Continue reading

Posted in Homosexuality | 170 Comments

Group Selection (and homosexuality)

You can imagine situations in which natural selection would favor an increase in frequency for a trait that aided group survival while hurting individual reproductive success – but it’s not all that easy. Here’s the problem: imagine a situation in … Continue reading

Posted in Homosexuality | 137 Comments

Paternal Age and Homosexuality

There’s something interesting about the paternal age effect in homosexuality – apparently there isn’t one. It certainly exists for autism, schizophrenia, manic-depression, and mental retardation, which suggests that de novo mutations play an important role in all of them. But … Continue reading

Posted in Homosexuality | 119 Comments

Gay genes

A recent paper discussed the results of a GWAS study of same -sex behavior, based on data from the UK Biobank. The data wasn’t ideal – it was based on self-reporting, and asked whether the respondent had ever had a … Continue reading

Posted in Uncategorized | 124 Comments

Not Even Yong

There was some noise at ASHG about someone (Tuck Ngun) claiming that he’d found evidence supporting that idea (published a couple of years ago) that homosexuality might be caused by epigenetic leakage. Which I doubted.  Everyone seems to have disbelieved … Continue reading

Posted in Uncategorized | 38 Comments

Transsexuals

Transsexuals, people that believe their psychological gender conflicts with their physical gender, are not a particular evolutionary paradox, because they’re far rarer than homosexual men. One in tens of thousands of men seek sex reassignment surgery – that is, pay … Continue reading

Posted in Uncategorized | 164 Comments

Evolution of Virulence

Once upon a time, I thought a lot about evolution and pathogens.  I still do, on occasion. It used to be the case [and still is] that many biologists thought that natural selection would inevitably tend towards a situation in … Continue reading

Posted in Uncategorized | 60 Comments

Biological Determinism

[“On a chilly Ohio Saturday morning in 1979, some time after divorcing his first wife Linda, Jim Lewis awoke in his modest, middle-class home next to his second wife, Betty. Jim – a romantic, affectionate type – was determined that … Continue reading

Posted in Uncategorized | 95 Comments

Not Final!

In mathematics we often prove that some proposition is true by showing that  the alternative is false.  The principle can sometimes work in other disciplines, but it’s tricky.  You have to have a very good understanding  to know that some … Continue reading

Posted in Uncategorized | 70 Comments

Hamilton Rules OK!

Hamilton’s rule says that altruistic genes should increase in frequency when rB > C,  when r is the identity-by-descent relatedness of the  recipient to the actor, B is the fitness benefit to the recipient, and C is the fitness cost … Continue reading

Posted in Uncategorized | 132 Comments