title: Reevaluation of the evidence for the generation of new lethal t haplotypes by mutation.
mesh_terms: D000483:Alleles; D000818:Animals; D005260:Female; D005804:Genes, Lethal; D006183:H-2 Antigens / Q000235:genetics*; D006238:Haploidy; D006579:Heterozygote; D006720:Homozygote; D008285:Major Histocompatibility Complex; D008297:Male; D051379:Mice; D009154:Mutation
chemical_list: D006183:H-2 Antigens