Bacteria: Recombination (IV) yj3 



40.7. What characteristics of Dissociation and Modulator resemble those of the episome F? 



40.8. By what mechanisms for shuffling genes might nucleotide-sharing be initiated? 



40.9. Discuss the possible role of nucleotide-sharing in integration, and in deintegrated 

 episomes. 



40.10. What do you think of the hypothesis that most, if not all, episomes or episomal 

 derivatives are nucleotide-sharing, and that nucleotide-sharing is associated with 

 motility? 



40.11. How do you suppose episomes originate? 



40.12. Have integrated episomes and episomal derivatives the general capacity to break 

 chromosomes? Explain. 



Could nucleotide-sharing be associated with such a capacity? Explain. 



40.13. Devise nucleotide sequences which would explain the differences between Bar, 

 Ultrabar, and wild-type eye shape in Drosophila. 



40.14. Devise nucleotide sequences which could be used to explain cis-trans position effects. 

 List the assumptions you have made in such an explanation. 



