Explanation:
Pedigree is like a recorded family tree with its past generations. In the pedigree, Circles represent females and Squares represent males. Now, the Roman numerals represent the generations. The long line (-) represents the marriange line and the bottom line under the parents, represent the line to the children. The shaded shapes are traits that are being tracked in the pedigree. An example of this are earlobes. Attached earlobes means that the recessive trait took over. Free unattached earlobes mean that the dominant trait took over.
That's as much as I can help with... Although, I do hope that this is helpful...
