" gave my mom a way to understand each of the terms. PCR is like a loud speaker. Gene cloning is like the mass production of one item of clothing. Labeled nucleotides are like adding post it notes to something. ddDNA is like a stop sign. Chain terminating sequence is like braille to help you read something. cDNA retracing your steps. RT-PCR is like a copy machine. A microarray is like using a light that shows what you wrote in a glow in the dark pen. Hybridization is like a mixture in a blender. A probe is like testing doors to see which one a certain key works in. "