How DNA Tests Actually Work 🧬 | DNA Test Explained in 3D Animation

Added: 2026-05-22

[00:00:00]To perform a DNA test, first a cotton swab is rubbed inside a person's cheek for around 20 to 30 seconds so that the cheek cells present there can be collected. Then that swab is placed inside a sealed tube so the sample doesn't get contaminated. After that, the sample is sent to a lab. In the lab, scientists first break those cells using chemicals. In this process, first the outer layer of the cell breaks, then the nucleus is opened because the DNA is hidden inside it. After that, special enzymes are added which cut the proteins and separate the DNA. Then alcohol is mixed into it and that's when the DNA starts looking like white thread like