[Theoria]

‘In 2004, investigators in Alaska uploaded a DNA profile extracted from semen to a criminal DNA database. It matched a potential suspect. But there was a problem: The man had been in prison at the time of the assault. It turned out that he had received a bone marrow transplant. The donor, his brother, was eventually convicted.’

[ASA Vet]

Just today two of my sons spit in the tube for their Ancestry DNA tests. They of course had to harass each other about which of them would not be a brother. These are grown men, but have to pick on each other constantly. I'm amazed their half sister who tested last week didn't go after both of them.