Problem child
Ron Bailey of
Reason writes up a
piece on something that's been in the
zeitgeist (at least the sociobiologically aware one) recently-a gene may
protect some against behavior problems due to abuse. It seems to be carried on the X chromosome, so one could think of it as a sex-linked ailment, but since the low-activity version of the gene is present in 1/3 of white New Zealand males, I'm not sure it is always so deleterious (a tendency toward high-risk behavior is attributed to those with the low-activity gene).
It would be interesting to see what the prevalence of this low-activity gene is in groups aside from white New Zealand males....