The animations below will show you how both PCR and RT-PCR work.

The PCR instructional animation can be found at this link. You can either watch and interact with it on the page or download it for Mac or PC at the links on the page.

https://www.dnalc.org/resources/animations/pcr.html

The interactive RT-PCR instructional animation can be found at the link below.

http://www.bio.davidson.edu/courses/Immunology/Flash/RT_PCR.html