unitary_pseudogene allelic_pseudogene INSDC_qualifier:allelic SO:0002189 allelic pseudogene nicole 2018-01-03T15:47:32Z A (unitary) pseudogene that is stable in the population but importantly it has a functional alternative allele also in the population. i.e., one strain may have the gene, another strain may have the pseudogene. MHC haplotypes have allelic pseudogenes. INSDC_feature:gene sequence