This project is solely dedicated to the R1a branch R-YP4141 and its subclades (YP5056 & YP4132). The project’s goals will be to help promote research and understanding of YP4141 (R1a2) and to discover deeper structure of all its branches, subclades, and clusters. We encourage our members to test at least 111 STR-markers (Y-111) in order for us to review your haplotype. With results from the Big Y it will be possible to accurately place you on the Y-Haplotree.