The document discusses two mutations in a bacteriophage that lead to different plaque types, with established mapping showing they are 10 map units apart. A mixture of phages with specific genotypes is used to infect bacterial cells, resulting in 1000 observed plaques. The question posed is to determine the total number of plaques represented by the l+c+ type from the progeny.

1. You isolate two mutations in a bacteriophage. One causes larger plaques (l) and the other
produces clear plaques (c). Previous mapping experiments have established that the genes
responsible for these mutations are 10 map units apart. You mix phages with genotypes l+c+and
l c;you use this mixture to infect bacterial cells. After collecting and plating the progeny phages,
you observe a total of 1000 plaques.
What will be the total number of plaques represented by the plaque type l+c+?
Group of answer choices
900
450
100
50