Is there really a "God gene"?

Faith-Boosting Genes: A Search for the Genetic Basis of Spirituality

The other day I heard someone proclaim that science had proven there is a God gene. Science has not done this. The author of this article says the book The God Gene by Dean Hamer would have been better entitled: "A Gene That Accounts for Less Than One Percent of the Variance Found in Scores on Psychological Questionnaires Designed to Measure a Factor Called Self-Transcendence, Which Can Signify Everything from Belonging to the Green Party to Believing in ESP, According to One Unpublished, Unreplicated Study."

The Evolution of the God Gene, The New York Times, Week in Review, by Nicholas Wade, November 14, 2009