Trans-splicing

Trans-splicing is like having two pieces of candy and putting them together to make a new candy. In this case, instead of candy, it's actually RNA, which is like a recipe book for the cell.

RNA is made up of little units called exons, which are like tiny instructions. Sometimes, cells need to make new versions of these RNA instructions, but they don't want to make the whole thing from scratch. So, they might take one exon from one RNA and join it with another exon from a different RNA, and use that new combination to make a new RNA recipe.

This joining of different exons from different RNAs is called trans-splicing. It's kind of like mixing and matching different pieces of LEGO blocks to make a new creation!