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Phenotypes Associated with This Genotype
Genotype
MGI:3662691
Allelic
Composition
F9tm1Dws/Y
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
F9tm1Dws mutation (1 available); any F9 mutation (8 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• male hemizygotes survive well if no injury occurs but occasionally exhibit sudden death during growth, mostly as a result of internal hemorrhage after normal fighting with littermates

homeostasis/metabolism
• male hemizygotes display a severe hemophilia B phenotype with reduced plasma clotting activity although an 8% residual activity is observed
• when their tails are cut, male hemizygotes bleed and die if the wound is not cauterized

cardiovascular system
N
• at 13 weeks of age, prohemorrhagic male hemizygotes display normal hearts with no evidence of hemosiderin deposition
• male hemizygotes are grossly normal but display spontaneous bleeding, as shown by hemorrhagic swelling of the top of the feet or of the footpads or the presence of pale footpads
• at autopsy, male hemizygotes show massive hemorrhages, mostly subcutaneous or in the dorsal surface musculature
• intra-cranial hemorrhages, hemorrhages in the axilliary and inguinal areas, hemorrhages around the salivary glands, and hemorrhages in the pericardium are also observed
• male hemizygotes display fatal internal hemorrhage after normal fighting with littermates

hematopoietic system
• male hemizygotes commonly exhibit splenomegaly, indicating anemia caused by blood loss

immune system
• male hemizygotes commonly exhibit splenomegaly, indicating anemia caused by blood loss

growth/size/body
• male hemizygotes commonly exhibit splenomegaly, indicating anemia caused by blood loss

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
hemophilia B DOID:12259 OMIM:306900
J:44497


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
06/12/2024
MGI 6.13
The Jackson Laboratory