Which Question, Arising from the Results Depicted in Figure 27

question 28

Multiple Choice

Which question, arising from the results depicted in Figure 27.2, is most interesting from a genetic perspective, and has the greatest potential to increase our knowledge base?

• A) If reciprocal crossing over could occur even if the piece of donated Hfr DNA is identical to the homologous portion of the recipient's chromosome, what prevents this from occurring?
• B) What forces are generally responsible for disrupting the sex pilus?
• C) How is it that a recipient cell does not necessarily become an Hfr cell as the result of conjugation with an Hfr cell?
• D) What makes a cell an Hfr cell?