Figure 9-7 Shows an Experiment Used to Determine the Spontaneous

Multiple Choice

Figure 9-7 shows an experiment used to determine the spontaneous mutation rate in E.coli.If the spontaneous mutation rate in E.coli is 1 mistake in every 10⁹ nucleotides copied, about how many colonies would you expect to see on the plates lacking histidine if you were to assay 10¹¹ cells from the culture for their ability to form colonies? Figure 9-7

A) 1
B) 2
C) 10
D) 100