Observed and Expected Numbers of Old and New Domains and Families inC. elegans Genes That Are Bounded Symmetrically by Phase 0, Phase 1, or Phase 2 Introns[i]
| New | Old | |||||||||||
| Domain (40) | Family (19) | Domain (134) | Family (52) | |||||||||
| Obs. | Exp. | P | Obs. | Exp. | P | Obs. | Exp. | P | Obs. | Exp. | P | |
| 0–0 | 1 | 7 | 0.01 | 1 | 3.9 | n.d. | 29 | 24.7 | 0.34 | 12.1 | 10.7 | 0.63 |
| 1–1 | 23 | 11.4 | <10−4 | 6.1 | 2.6 | n.d. | 8 | 27.3 | <10−4 | 3.4 | 7.2 | 0.13 |
| 2–2 | 0 | 2.1 | n.d. | 0 | 1.3 | n.d. | 7 | 7 | 1 | 3.3 | 3.5 | n.d. |
[i] Total numbers of domains in each category are indicated in parentheses. Some P-values were not determined (n.d.) due to the low sample size. (Obs.) Observed; (Exp.) Expected.