Analysis Tools|
Allele Symbol Allele Name Allele ID |
Alx4+ wild type MGI:1857474 |
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| Summary |
12 genotypes
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• preaxial polydactyly on one hind limb is often found
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• heterozygotes are apparently normal and do NOT display polydactyly
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• notably, heterozygous F1 progeny of a 129/Sv x C57BL/6J mating display hindlimb polydactyly
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• Background Sensitivity: penetrance is sensitive to genetic background
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• Background Sensitivity: found on the hindlimbs of this genotypic background but not on a 129/Sv background
• C57BL/6 is a permissive background
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• all double heterozygotes exhibit ectopic anterior digits only on the hindlimbs
• extra digit extends from a duplicated metatarsal
• extra digits are triphalangeal
• post axial "nubbins" also seen on the forelimbs of 80% of heterozygotes
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• mandibular reduction is mainly restricted to the region anterior to the alveolar process that surrounds the molars
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• mutants that carry three mutant alleles in any combination show cleft face associated with failure to fuse the cartilages of the nasal septum
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• mutant mice show a midline fusion defect that results in cleft face
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• mutants that carry three mutant alleles in any combination show cleft face associated with failure to fuse the cartilages of the nasal septum
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• mandibular reduction is mainly restricted to the region anterior to the alveolar process that surrounds the molars
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• mutants that carry three mutant alleles in any combination show cleft face associated with failure to fuse the cartilages of the nasal septum
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• all double homozygous null mice display exencephaly
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• mandibular reduction is mainly restricted to the region anterior to the alveolar process that surrounds the molars
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• mutants that carry three mutant alleles in any combination show cleft face associated with failure to fuse the cartilages of the nasal septum
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• mutant mice show a midline fusion defect that results in cleft face
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• double heterozygotes appear phenotypically normal
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• at E18.5, the presphenoid bone in the cranial base is severely malformed
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• at E18.5, the premaxilla is severely malformed
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• at E10.5, a clear reduction of Pax7 expression is observed in the caudal region of the lateral nasal process (LNP); both Lhx6 and Lhx8 mRNAs show higher ectopic expression in the caudal region of the LNP than in Alx1em1Jian homozygotes
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• at E18.5, severe notching of the upper lip is observed
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• at E18.5, the philtrum is further shortened relative to Alx1em1Jian homozygotes
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• at E18.5, the nasal bridge is severely widened
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• at E18.5, the nasal bridge is severely depressed
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• at E18.5, the premaxilla is severely malformed
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• at E18.5, severe notching of the upper lip is observed
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• at E18.5, the philtrum is further shortened relative to Alx1em1Jian homozygotes
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• at E18.5, the nasal bridge is severely widened
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• at E18.5, the nasal bridge is severely depressed
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• at E18.5, the presphenoid bone in the cranial base is severely malformed
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• at E18.5, the premaxilla is severely malformed
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• at E18.5, the nasal bridge is severely widened
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• at E18.5, the nasal bridge is severely depressed
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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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last database update 01/06/2026 MGI 6.24 |
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