Gel Electrophoresis

 Gel electrophoresis is a method for separation and analysis of macromolecules such as DNA, RNA, and proteins and their fragment based on their size and charge. The molecule added to the gel electrophoresis can move up or down on the gel according to their size or charge depending on the type of the molecules. 

Shorter molecules move faster and migrate faster than the longer ones because the shorter molecules migrate more easily through the pores of the gel. Their is different types of gel are: agarose, polyacrylamide, and starch. Also this technique is used in paternity test which is test to know the biological father of the child by taking DNA sample from the two possible father and from the mother of the child and compared them to the child DNA, so the one that the DNA bands match with the child DNA fragments he will be the real father of the kid.