Zoonoses

Question 1

Simian immunodeficiency virus

Answer 1

has entered the human population from primates (mainly chimpanzees) on several occasions. Each time it did this it acquired mutations whilst replicating in human cells that transformed it into distinct types of HIV.

Question 2

taking genes of interest from Y.pestis and inserting them into E.coli

Answer 2

the E.coli will react the same as Y.pestis during the experiments, but will not be able to infect and cause disease in the human immune system in the same way that Y.pestis does.