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Phenotypes Associated with This Genotype
Genotype
MGI:3036893
Allelic
Composition		 Hbb-b1tm1Unc/Hbb-b1tm1Unc
Hbb-b2tm1Unc/Hbb-b2tm1Unc
Genetic
Background		 involves: 129P2/OlaHsd * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hbb-b1tm1Unc mutation (2 available); any Hbb-b1 mutation (8 available)
Hbb-b2tm1Unc mutation (2 available); any Hbb-b2 mutation (5 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
perinatal lethality, complete penetrance ( J:30155 )
• all homozygous embryos are stillborn or die within 12 hours of birth

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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Send questions and comments to User Support. 		last database update
01/06/2026
MGI 6.24 		The Jackson Laboratory