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Phenotypes Associated with This Genotype
Genotype
MGI:5490541
hm1
Allelic
Composition		 Mei1m1Jcs/Mei1m1Jcs
Genetic
Background		 involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mei1m1Jcs mutation (1 available); any Mei1 mutation (57 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
reproductive system
abnormal male meiosis ( J:194067 )
• male germ cells lack double strand break
• however, pre-prophase pairing is normal

cellular
abnormal male meiosis ( J:194067 )
• male germ cells lack double strand break
• however, pre-prophase pairing is normal

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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Send questions and comments to User Support. 		last database update
03/24/2026
MGI 6.24 		The Jackson Laboratory