back Biology 240
  BIOL 240 visual lab guide   BIOL 240   My home page
 

Bacteriophage. Why does clearing occur in the lawn of bacteria? What is in the clear areas?

Plate A is an undiluted sample, note there are too many plaques to count. Plate B is made from a sample diluted 1:106 resulting in a countable number of plaques. To determine the number of phage in the original sample:

calculation

plateplate