Multiple choice Which of the following bacteriophages was the first DNA-based genome to be sequenced? Φ X 174 phage P1 phage λ phage T4 phage MS2 phage Reveal answer Fill a bubble to check yourself A Correct answer Explanation The phi X 174 bacteriophage was the first DNA-based genome to be sequenced. This work was completed by Fred Sanger and his team in 1977.