The assertion is made in this chapter that scientists now believe that transfer of DNA by conjugation in the colon is occurring across species and genus lines. Suppose you found the same type of...

The assertion is made in this chapter that scientists now believe that transfer of DNA by conjugation in the colon is occurring across species and genus lines. Suppose you found the same type of antibiotic resistance gene in members of two different genera. What criteria might you use to show that the gene was transferred horizontally? Why might you suspect that the gene was transferred by conjugation?