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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Or8a1tm9Mom
targeted mutation 9, Peter Mombaerts
MGI:3045148
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
 		Or8a1tm9Mom/Or8a1tm25Mom involves: 129P2/OlaHsd * C57BL/6 MGI:3694198
ht2
 		Or8a1tm2Mom/Or8a1tm9Mom involves: 129P2/OlaHsd * C57BL/6 MGI:3694204


Genotype
MGI:3694198
ht1
Allelic
Composition		 Or8a1tm9Mom/Or8a1tm25Mom
Genetic
Background		 involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Or8a1tm25Mom mutation (6 available); any Or8a1 mutation (69 available)
Or8a1tm9Mom mutation (1 available); any Or8a1 mutation (69 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
nervous system
abnormal olfactory neuron innervation pattern ( J:90716 )
• Hyb I axons co-converge and co-mingle with Olfrtm25Mom axons




Genotype
MGI:3694204
ht2
Allelic
Composition		 Or8a1tm2Mom/Or8a1tm9Mom
Genetic
Background		 involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Or8a1tm2Mom mutation (1 available); any Or8a1 mutation (69 available)
Or8a1tm9Mom mutation (1 available); any Or8a1 mutation (69 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
nervous system
abnormal olfactory neuron innervation pattern ( J:90716 )
• Hyb I axons segregate from Hyb B axons




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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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Send questions and comments to User Support. 		last database update
09/30/2025
MGI 6.24 		The Jackson Laboratory