In the Luria Delbruck fluctuation experiment, the bacteria + phage plates showed
A)all plates had some resistant colonies, some had very many.
B)some plates had no resistant colonies, a few plates had very many resistant colonies.
C)all plates had the same number of resistant colonies.
D)some plates had no resistant colonies; the plates that had resistant colonies all had the same number of resistant colonies.
E)phage caused mutations to occur in some of the plates but not in others

Question

Quizplus · Accepted Answer

The Luria Delbruck fluctuation experiment showed that mutations occur randomly and are not induced by selective pressure. In the bacteria + phage plates, some plates had no resistant colonies, while a few plates had very many resistant colonies. This indicates that mutations occurred randomly in some plates but not in others. Therefore, the best choice is B.

In the Luria Delbruck Fluctuation Experiment, the Bacteria + Phage