Below is a marvelous example of gel fabrication. You can call it “gel engineering” instead of “genetic engineering”. In the picture, three PCR reactions for three genes and corresponding gels has been provided. But author had smartly made the engineering of gels to create this example.
We identified a minimum of 4 spots where engineering has been done in these gels. We want that you should identify these spots and send us the replies at firstname.lastname@example.org or as comments.