1. Pedigree
Medical Detectives
© 2013 Project Lead The Way, Inc.

2. Pedigree Analysis
Method used to study the inheritance of genes in humans.
Can be used to indicate a possible diagnosis of a genetic disorder.

3. Pedigree Symbols
Symbols are used to represent family members.

4. Pedigree for Joe Bloggs

5. Optional Extension The ability to roll your tongue is a genetic trait.
As homework draw a pedigree for your family and for the trait of tongue rolling.
If the individual can roll his or her tongue, color in the symbol.

6. Image Sources
By Gideon Tsang from Austin, USA (rolled tongue). [CC-BY-SA-2.0 ( via Wikimedia Commons McClean, P. (n.d.). Mendelian genetics. Retrieved from