Gay brothers study

The Chicago Sun-Times posted an article about the Alan Sanders study of gay brothers currently recruiting pairs of gay brothers for a genetic linkage study. The website for the study is The brochure describing the study is on the site as a pdf.

I wrote Alan Sanders several months ago and asked if he was including measures of gender nonconformity as a covariable but received no reply. Environmental measures would also be helpful in the event they did not find linkages. I wonder if ex-gay brothers should apply?

As I read the comments of the researchers about what they hope to accomplish both in the article and in the brochure, it occurred to me that the researchers may be introducing bias into the sampling.

Given Bailey’s last twin study, I have to wonder about this statement to prospective participants:

Earlier studies suggest that homosexual orientation runs in families; 8 to 12% of brothers of gay men are also gay, compared to 2 to 4% of men in the general population. Twin studies suggest that this pattern is largely due to heredity rather than environment, but we cannot be sure of this unless we actually locate genes that affect sexual orientation.