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Modern Genetic Analysis Chapter 9. The Genetics of Bacteria and Phages Bacteriophage Genetics
Table 9-2. Progeny Phage Plaque Types from Cross h r+ × h+ r

Phenotype | Inferred genotype

Clear and small | h r+
Cloudy and large | h+ r
Cloudy and small | h+ r+
Clear and large | h r

NOTE: Clearness is produced by the h allele, which allows infection of both bacterial strains in the lawn; cloudiness is produced by the h+ allele, which limits infection to the cells of strain 1.

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