Table 2.
Intron Losses are More Frequent Than Insertions
|
|
Features of Model |
Number of Introns Lost |
Total Introns |
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model |
fog-3 In # 7 |
cpb-2 In # 2 |
Never |
Once |
Twice |
Lost |
Gained |
Ratio of Loss/Gain |
||||
| 1 | Independent | Ancestral | 23 | 4 | 7 | 18 | 2 | 9.0 | ||||
| 2 | Independent | Inserted | 23 | 5 | 6 | 17 | 3 | 5.7 | ||||
| 3 | Ancestral | Ancestral | 23 | 5 | 6 | 17 | 2 | 8.5 | ||||
| 4
|
Ancestral
|
Inserted
|
23
|
6
|
5
|
16
|
3
|
5.3
|
||||
-
Because there are two ambiguities in the phylogeny of these introns, four different models that explain the pattern of intron evolution are possible.
