Cells that lack Tk gene cannot produce thymidine kinase and die in absence of thymidine 1.2 DNA is the 器 genetic material 器 Dead cells Add TKTDNA 参 Live cells Figure 1. 4 Eukaryotic cells 像器 can acquire a new phenotype 器象 as the result of transfection 像 by added DNA 象 Colony of Tk t cell 消当 Some cells ta ke up k gene descendants of transfected cell pile up into a colonyFigure 1.4 Eukaryotic cells can acquire a new phenotype as the result of transfection by added DNA. 1.2 DNA is the genetic material