Development of rachiterata, a mutation in the house mouse with 6 cervical vertebrae.
D000015:Abnormalities, Multiple / Q000209:etiology; D000818:Animals; D002574:Cervical Vertebrae / Q000002:abnormalities*; D008159:Lumbar Vertebrae / Q000002:abnormalities; D051379:Mice / Q000196:embryology; D009154:Mutation; D013904:Thoracic Vertebrae / Q000002:abnormalities; D013997:Time Factors