How does CRISPR gene editing target specific human genes?

CRISPR gene editing is like having a special tool that can find and change specific letters in a very long book, the human body’s instruction manual.

Imagine your favorite storybook has a lot of pages, and each page has words made up of letters. Now, imagine you want to change just one letter on one page, maybe changing "cat" to "bat." That's what CRISPR does in our bodies: it finds the exact spot in the DNA book where a gene is written and changes it.

CRISPR has something like a finder that looks for a specific sequence of letters, kind of like looking for your favorite word in the storybook. Once it finds the right place, it uses a special scissors to cut the DNA there.

After the scissors make a small cut, the body tries to fix it. That's when CRISPR helps by giving the cell a new letter or letters to use, like putting in a sticker with the right word on it so the story makes sense again.

This way, scientists can change just one part of the DNA book without messing up anything else, kind of like fixing one sentence in your favorite story instead of rewriting the whole thing!