Biology · Bacterial Genetics
Conjugation experiments were performed by mixing four different auxotrophic strains (P, Q, R and S) of E. coli in different combinations. The generation of prototrophs in each of these combinations on appropriate minimal selection media is given below: Combination of strains | No. of prototrophs obtained P and Q | 20 S and R | 1000 P and R | 0 P and S | 1000 Based on the above data, the following statements were made: A. Strains P and R are F- strains. B. Strain Q is an F+ strain. C. Strain S is an Hfr strain. D. Strains P and R are F+ and F- strains, respectively. E. Strains P and R are both Hfr strains. Which one of the following options represents a combination of all correct statements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A, B and C✓
- 2B, C and E
- 3A, B and D
- 4A, C and D
Correct answer
A, B and C
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