A "cheek swab" is a way to collect a sample of cells from the inside of your cheek using a small cotton swab. It is often done for DNA testing or other medical purposes to learn more about your genetic information. Full definition
A simple cheek swab sample may be submitted for DNA analysis to determine the existence of the MDR1 - 1 ∆ mutation in any particular pet. (houzz.com)
The AHT will send DNA cheek swab sampling kits free of charge together with the necessary documentation. (thebullterrierclub.org)
All you have to do with at - home dog DNA tests is order the test online, take a simple cheek swab from your dog, place the swab in the provided container and mail it back in a prepaid envelope. (caninejournal.com)