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Phenotypes Associated with This Genotype
Genotype
MGI:3812068
Allelic
Composition
Eya1tm1Rilm/Eya1+
Genetic
Background
involves: 129 * C3HeB/FeJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Eya1tm1Rilm mutation (1 available); any Eya1 mutation (57 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hearing/vestibular/ear
• there are slightly increased numbers of inner hair cells in the middle region of E18.5 embryos
• in the apex region, cochleae had many extra hair cells (nearly two rows of inner hair cells)
• adult mice exhibit short and disorganized stereocilia bundles
• some of the outer hair cell bundles are missing in the middle and apical regions
• nine of 22 mice show shortened or/and malformed cochlea at E18.5
• one ear retained only about one-half turn and another ear retained about three-quarter turn
• majority of the affected ears lost around one-half turn of the cochlea
• there is a slight but significant reduction in the number of hair cells found in the sacculle of mice (1508 vs. 1705 in wild-type)
• 2 mice of 22 mice at E18.5 have truncated posterior semicircular canals
• 2 of 22 mice at E18.5 have truncated ampulla, one posteriorly and one anteriorly
• 2 mice of 22 mice at E18.5 have truncated anterior semicircular canals
• 5 of 22 mice at E18.5 have malformed cochlea
• 4 mice of 22 mice at E18.5 have a truncated endolymphatic duct

nervous system
• there are slightly increased numbers of inner hair cells in the middle region of E18.5 embryos
• in the apex region, cochleae had many extra hair cells (nearly two rows of inner hair cells)
• adult mice exhibit short and disorganized stereocilia bundles
• some of the outer hair cell bundles are missing in the middle and apical regions
• there is a slight but significant reduction in the number of hair cells found in the sacculle of mice (1508 vs. 1705 in wild-type)


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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last database update
01/28/2026
MGI 6.24
The Jackson Laboratory