Bacteria are infected with phages labeled with sZP()in DNA or with 3os(o) in protein 1.2 DNA is the genetic material Separate phage coats and infe cted bacteria Phage coats contain 80%of Infected bacteria contain 70%o label I solate progeny phage particle Progeny phage s have 30 % of 32p label and <1% of 35s label Figure 1.3 The genetic material of phage 12 IS DNA 消当Figure 1.3 The genetic material of phage T2 is DNA. 1.2 DNA is the genetic material