Category Archives: Homosexuality

Homosexuality, epigenetics, and zebras

Posted on January 12, 2013 by gcochran9

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 | 172 Comments

Group Selection (and homosexuality)

Posted on January 10, 2013 by gcochran9

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

Posted on January 6, 2013 by gcochran9

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

Depths of Madness

Posted on February 16, 2012 by gcochran9

I’ve said it before, but it’s probably time to say it again.  The most likely explanation for human homosexuality is that it is caused by some pathogen.  It’s too common to be mutational pressure (and we don’t see syndromic versions, … Continue reading →

Posted in Evolutionary Medicine, Homosexuality | 315 Comments