question_answer

A mutant strain of \[{{T}_{4}}\] - Bacteriophage, R-II, fails to lyse the E-Coli but when two strains \[R-I{{I}^{X}}\]and \[R-I{{I}^{y}}\]are mixed then they lyse the E. Coli What may be the possible reason:-

A)  Bacteriophage transforms in wild

B)  It is not mutated

C)  Both strains have simillar cistrons

D)  Both strains have different cistrons