In 1928 frederick griffith discovered harmless bacteria can be transformed chemically into harmful bacteria. in 1944 oswald avery and his co-workers determined that genes are composed of dna. in 1952 rosalind franklin studied dna using a technique called x-ray diffraction. in 1953 watson and crick developed the double helix model for the structure of dna. in 2000 the human genome project, (the mapping and sequencing of human dna), was basically completed. what does this scenario tell us about how the human genome project was even possible?