swab

It is a cheek swab or blood test, which is done once in an athlete's life by each national federation.

The test for the SRY gene - which is part of the Y chromosome and causes male characteristics to develop - can be conducted via a cheek swab or blood test.

“I would be very concerned if I had given a swab to 23andMe,” she said.

Heller said that state park and wildlife officials took swabs of his board on the beach to analyze the shark DNA and then asked to take his board to analyze the shark bites.

The swabs containing odours had been rubbed under the armpit, behind the ear, and between the toes of the owner or stranger.