In genetics, a pedigree is a diagram of a family tree showing the relationships between individuals together with relevant facts about their medical histories. A pedigree analysis is the interpretation of these data that allows a better understanding of the transmission of genes within the family. Usually, at least one member of the family has a genetic disease, and by examining the pedigree, clues to the mode of inheritance of the disorder and the potential risk to other family members can be obtained.

The pedigree is initiated by using a symbol to represent the proband or individual seeking counseling. mmediate family members (parents, siblings, spouse, children) are added next, followed by aunts, uncles, cousins, grandparents, and others in the proper orientation. Males are indicated as squares and females as circles. The square or circle is filled in for any affected individuals to reflect their disease status...