How does the CRISPR gene editing technology actually work inside cells?

CRISPR is like a super-smart pair of scissors that can fix mistakes in a cell’s instruction book.

Imagine your cell has a long, twisty recipe book, this is its DNA. Sometimes the recipe gets written wrong, and that causes problems, like when you get a cold or a bruise. CRISPR helps find the mistake and cut it out so the cell can fix it.

CRISPR has a special part called guide RNA, which is like a map. It leads the scissors, called Cas9, right to where the mistake is in the recipe book. Once there, the scissors snip out the wrong part of the recipe.

After the mistake is snipped out, the cell can either:

• Use a new, correct recipe to replace the old one, like swapping a broken pencil for a new one.
• Just let the rest of the recipe book fix itself, like when you erase a wrong word and write the right one in.

It’s like having a smart friend who knows exactly where to look and what to change, no magic, just clever tools!