How does CRISPR gene editing actually change DNA?

CRISPR gene editing is like giving DNA a little edit button so it can change itself.

Imagine your DNA is like a very long book that tells your body how to work. Each page in the book has instructions for different parts of you, like your eyes, hair color, or even if you’re good at jumping. Now, sometimes there’s a typo on one of those pages, and that can make something not quite right.

CRISPR is like a super-smart detective who finds the typo and fixes it. It uses a special tool called Cas9, which acts like a pair of scissors, it cuts out the wrong part of the book. Then your body helps put in the correct letter or word, just like when you fix a spelling mistake in your homework.

Think of CRISPR as a bookmark that guides the scissors to exactly where they need to go. It matches up with a specific part of DNA, kind of like how a bookmark finds your favorite page in a book. Once it’s there, Cas9 slices the DNA, and then your body can paste in the new letter or word.

This is how CRISPR changes DNA, by finding the mistake, cutting it out, and letting the body put in the right part instead!