The was a massive scientific undertaking meant to identify and sequence all of the genes found in a human cell. this is just one example of , the branch of biology that studies whole , which are the complete sets of dna found within organisms. one of the interesting conclusions from this project was that only about 1.5% of human dna encodes for . although it was groundbreaking for its time, it is now fairly routine to completely sequence the dna of an organism using the method. in this method, the dna is chopped up with restriction enzymes, the fragments are sequenced, and then they are reassembled into one continuous sequence. through such analyses, scientists are learning much about human dna and its relation to other species.