What would happen if the electrodes were reversed in gel electrophoresis?

There would be some differences that will occur if the electric field direction will be reversed. First of all, the migration of the dendrimers is going to be reversed too. The polarity of the electrodes will also be reversed. Take note that it will be a bit different if they would already be in different wires.

For example, the red and black wires that will be used to connect outlets will not work properly if the electric field direction will be reversed. There are also some differences that may occur depending on the voltage that will be used. The higher the voltage, the faster the DNA will move.