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Phenotypes Associated with This Genotype
Genotype
MGI:3703016
Allelic
Composition
Hoxa1tm4(Hoxb1)Mrc/Hoxa1tm4(Hoxb1)Mrc
Hoxb1tm5Mrc/Hoxb1tm8(Hoxa1)Mrc
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * BALB/cJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa1tm4(Hoxb1)Mrc mutation (0 available); any Hoxa1 mutation (15 available)
Hoxb1tm5Mrc mutation (0 available); any Hoxb1 mutation (24 available)
Hoxb1tm8(Hoxa1)Mrc mutation (0 available); any Hoxb1 mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• eyeblink reflex is impaired in 58% of mutants; only 11% are considered to be severely affected

nervous system
• zygomatic and temporal branches of facial nerve have normal caliber, but occasionally show atypical arborization pattern


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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Funding Information
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last database update
01/20/2026
MGI 6.24
The Jackson Laboratory