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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Hoxd9tm1Mrc
targeted mutation 1, Mario Capecchi
MGI:3525581
Summary 5 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cx1
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxc9tm1Mrc/Hoxc9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
involves: 129S7/SvEvBrd MGI:4358350
cx2
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxc9tm1Mrc/Hoxc9+
Hoxd9tm1Mrc/Hoxd9tm1Mrc
involves: 129S7/SvEvBrd MGI:4358353
cx3
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Not Specified MGI:3526127
cx4
Hoxa9tm1Mrc/Hoxa9+
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Not Specified MGI:3526128
cx5
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9+
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Not Specified MGI:3526129


Genotype
MGI:4358350
cx1
Allelic
Composition
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxc9tm1Mrc/Hoxc9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Genetic
Background
involves: 129S7/SvEvBrd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa9tm1Mrc mutation (0 available); any Hoxa9 mutation (17 available)
Hoxb9tm1Mrc mutation (0 available); any Hoxb9 mutation (12 available)
Hoxc9tm1Mrc mutation (0 available); any Hoxc9 mutation (22 available)
Hoxd9tm1Mrc mutation (0 available); any Hoxd9 mutation (16 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
limbs/digits/tail
• two fewer than in wild-type mice

skeleton
• two fewer than in wild-type mice
• mice lack distinct sternebrae unlike in wild-type mice
• the sternum is ossified and mispatterened along its entire anterior posterior length
• the first rib does not always attach to the sternum unlike in wild-type mice
• rib attachment to the sternum continues past T7 to T13 and the transformed 'T14'
• posterior rib growth is abnormal with 4 vertebrae posterior to T13 forming ribs
• distal fusion of anterior-most ribs
• shifted posteriorly with displacement of pelvic attachment
• mice exhibit anterior homeotic transformations through the posterior thoracic skeleton and into the lumbar region
• the axial skeleton posterior to the transformations are shifted caudally by two vertebral segments
• T8 through L2 exhibit a T7-like phenotype
• T8 through L2 exhibit a T7-like phenotype
• L5 has an L3-like phenotype




Genotype
MGI:4358353
cx2
Allelic
Composition
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxc9tm1Mrc/Hoxc9+
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Genetic
Background
involves: 129S7/SvEvBrd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa9tm1Mrc mutation (0 available); any Hoxa9 mutation (17 available)
Hoxb9tm1Mrc mutation (0 available); any Hoxb9 mutation (12 available)
Hoxc9tm1Mrc mutation (0 available); any Hoxc9 mutation (22 available)
Hoxd9tm1Mrc mutation (0 available); any Hoxd9 mutation (16 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
skeleton
• mice exhibit two extra ribbed vertebrae on T8 and T9 that attach to the sternum
• mice exhibit two extra ribbed vertebrae on T8 and T9 that attach to the sternum




Genotype
MGI:3526127
cx3
Allelic
Composition
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Genetic
Background
Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa9tm1Mrc mutation (0 available); any Hoxa9 mutation (17 available)
Hoxb9tm1Mrc mutation (0 available); any Hoxb9 mutation (12 available)
Hoxd9tm1Mrc mutation (0 available); any Hoxd9 mutation (16 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• at day 12.5 of pregnancy branching of the epithelial ductal system is significantly reduced
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration

integument
• at day 12.5 of pregnancy branching of the epithelial ductal system is significantly reduced
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration




Genotype
MGI:3526128
cx4
Allelic
Composition
Hoxa9tm1Mrc/Hoxa9+
Hoxb9tm1Mrc/Hoxb9tm1Mrc
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Genetic
Background
Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa9tm1Mrc mutation (0 available); any Hoxa9 mutation (17 available)
Hoxb9tm1Mrc mutation (0 available); any Hoxb9 mutation (12 available)
Hoxd9tm1Mrc mutation (0 available); any Hoxd9 mutation (16 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration

integument
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration




Genotype
MGI:3526129
cx5
Allelic
Composition
Hoxa9tm1Mrc/Hoxa9tm1Mrc
Hoxb9tm1Mrc/Hoxb9+
Hoxd9tm1Mrc/Hoxd9tm1Mrc
Genetic
Background
Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hoxa9tm1Mrc mutation (0 available); any Hoxa9 mutation (17 available)
Hoxb9tm1Mrc mutation (0 available); any Hoxb9 mutation (12 available)
Hoxd9tm1Mrc mutation (0 available); any Hoxd9 mutation (16 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration

integument
• mammary glands in virgin females appear normal, however during and after pregnancy mammary gland hypoplasia as a result of a delay in growth and differentiation of the mammary epithelium is seen
• after parturition reduced numbers of lobuloalveolar structures and large amounts of intracellular fat droplets are seen
• mutant females have difficulty nursing pups with most pups dying shortly after birth of dehydration





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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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last database update
04/23/2024
MGI 6.23
The Jackson Laboratory