University of Michigan Center for Statistical 




Graphical Representation of Relationships

GRR is a Windows-based application for detecting pedigree errors via graphically inspecting the distribution for marker allele sharing among pairs of family members or all pairs of individuals in a study.

Background Information

Read about how GRR can help detect pedigree errors..

 Quick-Start Tutorial

Take a tour of the GRR package. Recommended.

Download programs

Download the latest version of the software. Updated August 2003.

Registration form

If you decide to use GRR, please take a minute to let us know.


University of Michigan | School of Public Health | Abecasis Lab