A 15-year-old boy has tracked down his anonymous sperm donor father using a swab test and the internet.

He sent off his own cheek swab to an online genealogy DNA-testing service.

This case has serious implications for men who have donated sperm in the past with promises of anonymity, says New Scientist Magazine.

Bryan Sykes, a geneticist at Oxford University and chairman of the family tree tracing service OxfordAncesters.com, said the case raised serious questions about whether past promises of anonymity could be honoured.

Source: BBC