Here's a breakdown:
* Gel: The gel is a porous matrix made of agarose or polyacrylamide. It acts like a sieve, separating DNA fragments based on their size.
* Wells: Small indentations at the top of the gel are called wells. These wells are where you load your DNA samples.
* Electrophoresis: An electric current is applied across the gel. DNA, which is negatively charged, will migrate towards the positive electrode at the bottom of the gel.
* Separation: Smaller DNA fragments move through the gel more easily than larger ones, resulting in a separation of fragments based on their size.
So, the DNA is loaded into the wells at the top of the gel and then migrates down through the gel during the electrophoresis process.
