Top Posters
Since Sunday
g
3
3
2
J
2
p
2
m
2
h
2
s
2
r
2
d
2
l
2
a
2
SlideshowReport

Case 1: The outgroups help resolve the polytomy

Description
If species 1 and 2 are sister groups, we can explain the observed traits with a single evolutionary event (A). If species 2 and 3 are sister groups, we require two evolutionary events, either (B) two independent arisals of dark coloration, or (C) both the evolution of dark coloration early, with a subsequent reversion to light coloration in one lineage later. Red arrows indicate evolutionary changes in the trait.01 = outgroup 1; 02 = outgroup 2.
Related Images
Add Comment
Explore
Post your homework questions and get free online help from our incredible volunteers
  992 People Browsing
 159 Signed Up Today
Your Opinion
Do you believe in global warming?
Votes: 370