Short tandem repeat

Okay, kiddo! Sometimes we can look at a part of our DNA called a "short tandem repeat" or STR for short. It's like a little pattern that repeats over and over again. Scientists can count how many times the pattern repeats and use that information to help figure out who someone is, like a fingerprint. Think of it like counting how many dots there are on your fingers and toes to make sure they're all there!