DNA testing traces anonymous sperm donor

3 November 2005

An anonymous sperm donor has been traced by his 15-year old genetic son, using an internet based genealogy DNA-testing service. The boy supplied his own cheek swab sample to FamilyTreeDNA.com, which identified two men with genetically similar Y-chromosomes, both sharing the same surname. Although the sperm donor himself had never supplied DNA to the database, this surname information combined with the details the boy already knew