Why was Human Genome Project Started? The Human Genome Project (HGP) was an international scientific research endeavour that attempted to determine the base pairs that make up human DNA and map them for their functions and corresponding attribution to physical features. It is the world's largest collective biological project whose planning began in 1990 and it was declared complete on April 14, 2003. It achieved the "whole genome" sequence in May 2021. It was a 13-year collab