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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Polr1a+
wild type
MGI:2434682
Summary 6 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Polr1atm1b(EUCOMM)Hmgu/Polr1a+ C57BL/6N-Polr1atm1b(EUCOMM)Hmgu/Bay MGI:6288657
ht2
Polr1aem1Knwea/Polr1a+ C57BL/6-Polr1aem1Knwea MGI:7526438
ht3
Polr1aem2Knwea/Polr1a+ C57BL/6-Polr1aem2Knwea MGI:7526440
ht4
Polr1aem3Knwea/Polr1a+ C57BL/6-Polr1aem3Knwea MGI:7526442
ht5
Polr1atm1d(EUCOMM)Hmgu/Polr1a+ involves: C57BL/6N MGI:7526455
ht6
Polr1atm1a(EUCOMM)Hmgu/Polr1a+ involves: C57BL/6N MGI:7526454


Genotype
MGI:6288657
ht1
Allelic
Composition
Polr1atm1b(EUCOMM)Hmgu/Polr1a+
Genetic
Background
C57BL/6N-Polr1atm1b(EUCOMM)Hmgu/Bay
Cell Lines HEPD0779_7_B03
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1atm1b(EUCOMM)Hmgu mutation (0 available); any Polr1a mutation (95 available)
Data Sources
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye




Genotype
MGI:7526438
ht2
Allelic
Composition
Polr1aem1Knwea/Polr1a+
Genetic
Background
C57BL/6-Polr1aem1Knwea
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1aem1Knwea mutation (0 available); any Polr1a mutation (95 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
N
• mice born at expected Mendelian ratios and normal sex ratio

growth/size/body
N
• no obvious phenotype

reproductive system




Genotype
MGI:7526440
ht3
Allelic
Composition
Polr1aem2Knwea/Polr1a+
Genetic
Background
C57BL/6-Polr1aem2Knwea
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1aem2Knwea mutation (0 available); any Polr1a mutation (95 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
• mice born at expected Mendelian ratios and normal sex ratio

growth/size/body
• no obvious phenotype

reproductive system




Genotype
MGI:7526442
ht4
Allelic
Composition
Polr1aem3Knwea/Polr1a+
Genetic
Background
C57BL/6-Polr1aem3Knwea
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1aem3Knwea mutation (0 available); any Polr1a mutation (95 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
• mice born at expected Mendelian ratios and normal sex ratio

growth/size/body
• no obvious phenotype




Genotype
MGI:7526455
ht5
Allelic
Composition
Polr1atm1d(EUCOMM)Hmgu/Polr1a+
Genetic
Background
involves: C57BL/6N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1atm1d(EUCOMM)Hmgu mutation (0 available); any Polr1a mutation (95 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
• mice born at expected Mendelian ratios and sex ratios

growth/size/body
• no obvious phenotype

reproductive system




Genotype
MGI:7526454
ht6
Allelic
Composition
Polr1atm1a(EUCOMM)Hmgu/Polr1a+
Genetic
Background
involves: C57BL/6N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr1atm1a(EUCOMM)Hmgu mutation (1 available); any Polr1a mutation (95 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
N
• mice born at expected Mendelian ratios and sex ratios

growth/size/body
N
• no obvious phenotype

reproductive system





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last database update
01/20/2026
MGI 6.24
The Jackson Laboratory