MartinM
GondolierAce
Dexx said:But my take on it was that the author is saying that ERVS infect species independently.
Well, of course they can! It's not as if anyone ever claimed that inheritance from an ancestor is the only way to get an ERV insertion. If it was, how on earth would the ancestor have got it in the first place?
The point is that if an ERV infects multiple species independently, it leaves its mark in different places in each species. Whereas the descendants of any one species will retain that mark in the same place. So we can tell the difference between an ERV insertion shared because of multiple insertions into separate species, and an ERV insertion shared due to common ancestry.
Upvote
0