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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Zfy2em1Asah
endonuclease-mediated mutation 1, Hiroshi Asahara
MGI:5824557
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Zfy2em1Asah/Zfy2em1Asah involves: C57BL/6 * DBA/2 MGI:8290601


Genotype
MGI:8290601
hm1
Allelic
Composition
Zfy2em1Asah/Zfy2em1Asah
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Zfy2em1Asah mutation (0 available); any Zfy2 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
• outer dense fibers are disrupted
• axonemes are disrupted
• sperm exhibit abnormalities of mitochondrial formation
• abnormal sperm heads are seen in the epididymis
• acephalic sperm are seen in the epididymis
• number of motile sperm is reduced (70%) compared to wild-type (85.6%)
• males are subfertile, with pregnancy success rates of 60% and deceased average litter size
• and testis and epididymal sperm count are normal

cellular
• outer dense fibers are disrupted
• axonemes are disrupted
• sperm exhibit abnormalities of mitochondrial formation
• abnormal sperm heads are seen in the epididymis
• acephalic sperm are seen in the epididymis
• number of motile sperm is reduced (70%) compared to wild-type (85.6%)





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