Suppose that HIV were the ancestor of the SIVs, instead of the other way around. If immuno...

Suppose that HIV were the ancestor of the SIVs, instead of the other way around. If immunodeficiency viruses were originally transmitted from humans to monkeys and chimpanzees, make a sketch of what Figure would look like.

Figure The origin of HIV (a) Estimated evolutionary tree for immunodeficiency viruses from humans, chimpanzees,and African monkeys. Redrawn from Hahn et al. (2000).