The episome in an Hfr strain is inserted near the trp (tryptophan operon) locus. This Hfr strain is grown with an F- Trp- strain. From this mating, we isolate an F+ Trp+ strain that can readily impart the Trp+ phenotype to F- Trp- strains, but no other traits are ever transferred. (When the original Hfr strain is mated with F? strains, traits other than Trp+ can be transferred, although at lower frequency than Trp+.) What most likely has happened?

A) An F? trp+ plasmid has been generated.
B) Mutation occurred.
C) Transduction occurred.
D) Transformation occurred.


A) An F? trp+ plasmid has been generated.

Biology & Microbiology

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Biology & Microbiology

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Biology & Microbiology

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What will be an ideal response?

Biology & Microbiology

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Biology & Microbiology