A t-haplotype (tw75) overlapping two complementation groups.
D000483:Alleles; D000818:Animals; D003433:Crosses, Genetic; D005804:Genes, Lethal; D005816:Genetic Complementation Test; D051379:Mice; D008817:Mice, Mutant Strains / Q000235:genetics*; D010641:Phenotype