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Search Results for: homosexual
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
159 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
125 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
118 Comments
The Third Sex
There isn’t one. But you have to admit that it would be interesting if there were. There are all kinds of different twists on basic biology that would make for a different kind of society, if they only existed in … Continue reading
Posted in Uncategorized
144 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
37 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
163 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
59 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
94 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
68 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
134 Comments
