The main chapters in the Old and New Testament that deal with the issue of homosexuality are:
New Testament: Romans 1:26-27 (Both lesbian and homosexual activities are condemned in these verses and shown as a further result of turning away from God. God only approves of monogamous, heterosexual relationships in marriage, condemning fornication and adultery before marriage and within marriage.); 1 Corinthians 6:9; 1 Timothy 1:10; and see also Jude 7.
For a Christian site that has done excellent research on this as well as other current moral issues in our society, please check out Probe Ministries at www.probe.org. Their web site has several articles by a number of writers and researchers who have studied this area. On their site, you can search for “homosexual” and find a number of articles which include the authors’ names and email addresses.