Open and Affirming (ONA):
Homosexuality - What does science say?

“Answers to Your Questions ?For a Better Understanding of Sexual Orientation & Homosexuality” on the American Psychological Association Website
http://www.apa.org/topics/sorientation.html

“Sexual Orientation 101”
http://integritycanada.org/orientation101.html

“This site features work by Dr. Gregory Herek an internationally recognized authority on sexual prejudice (also called homophobia), hate crimes, and AIDS stigma. It provides factual information to promote the use of scientific knowledge for education and enlightened public policy related to sexual orientation and HIV/AIDS.”
http://psychology.ucdavis.edu/rainbow/index.html

The following articles present evidence that there are equal levels of commitment and satisfaction in homosexual and heterosexual relationships. Glenn I. Roisman, Eric Clausell, Ashley Holland, Keren Fortuna, and Chryle Elieff, “Adult Romantic Relationships as Contexts of Human Development: A Multimethod Comparison of Same-Sex Couples with Opposite-Sex Dating, Engaged, and Married Dyads,” Developmental Psychology 44 (2008), 91-101.
http://www.apa.org/journals/releases/dev44191.pdf

Kimberly F. Balsam, Theodore P. Beauchaine, Esther D. Rothblum, and Sondra E. Solomon, “Three-Year Follow-Up of Same-Sex Couples Who Had Civil Unions in Vermont, Same-Sex Couples Not in Civil Unions, and Heterosexual Married Couples,” Developmental Psychology 44 (2008), 102-116.
http://www.apa.org/journals/releases/dev441102.pdf

Many helpful links on homosexuality and science:
http://www.bridges-across.org/ba/science.htm

A bibliography focused on biological roots of homosexuality:
http://members.aol.com/GAYGENE/pages/biblio.htm