A mutant gene maintained at high frequency in spite of complete selection against the momozygote.
D000818:Animals; D002874:Chromosome Mapping; D001517:Coleoptera; D005260:Female; D005787:Gene Frequency; D005808:Genes, Recessive; D006579:Heterozygote; D006720:Homozygote; D008297:Male; D012641:Selection, Genetic