All nonredundant Gene Ontology (Ashburner et al. 2000) terms enriched in the set of clones suspected to have no expressed paralogs in X. laevis. Categories with a false discovery rate (FDR) ≤0.10 are shown. Several very large generic categories were removed for clarity. No statistically significant categories were found for genes for which a tetraploidization-derived paralog was found.