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The Episome in an Hfr Strain Is Inserted near the Trp

Question 12

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The episome in an Hfr strain is inserted near the trp (tryptophan) locus.This Hfr strain is incubated with an F-trp- strain.We isolate a trp+ strain that can readily donate the trp+ phenotype to other F- trp+ strains.No other traits are transferred.What has happened?


A) An F+ trp plasmid has been generated
B) Typical Hfr mating
C) Transduction occurs
D) Transformation occurs

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