You should be able to
describe how agarose gels work
determine the size of a DNA band on an agarose gel
Watch this video to learn how gel electrophoresis works.
This is a good, but long (15 min) video.
Note: they talk about the specific project they are doing, where they used a restriction enzyme to cut their DNA after PCR. We won't be doing that. Our goal is just to see if the PCR reaction worked and amplified DNA.
Watch this for a shorter explanation of how gel electrophoresis works.
Work through this interactive to learn how gel electrophoresis works
Read this description of the components of your agarose gel and what they do
Answer these questions to make sure you understand how agarose gels work