A pedigree is a chart for tracing genes in a family. Start by watching this video on Pedigree Analysis. Then continue reading further down the page. 

When using a pedigree to trace genotype, keep these things in mind:

Go to the Drag-and-Drop Pedigree page. Work through the 4 genetic problems (Tongue Rolling, Eye Color, Diabetes, and Hypertension) on this site as practice for solving pedigrees. Be sure to read the directions on the first page. 

For fun you can watch the video, Harry Potter and the Genetics of Wizarding. This video was made for National DNA Day 2016.