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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
KitW-42J
dominant spotting 42 Jackson
MGI:1856245
Summary 8 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
KitW-42J/KitW-42J C57BL/6J-KitW-42J/J MGI:3054641
ht2
KitW-42J/Kit+ C57BL/6J-KitW-42J/J MGI:2167486
ht3
KitW-42J/Kit+ involves: C57BL/6 * C57BL/6J * WB MGI:3813818
ht4
KitW-42J/KitW involves: C57BL/6 * C57BL/6J * WB MGI:3813817
ht5
KitW-39J/KitW-42J involves: C57BL/6J MGI:3813693
cx6
KitW-42J/KitW-42J
X/SryAKR/J
involves: AKR/J * C57BL/6J MGI:3716809
cx7
KitW-42J/Kit+
X/SryAKR/J
involves: AKR/J * C57BL/6J MGI:3716808
cx8
KitW-42J/Kit+
X/SryPOS-TIR
involves: C57BL/6J MGI:3716810


Genotype
MGI:3054641
hm1
Allelic
Composition
KitW-42J/KitW-42J
Genetic
Background
C57BL/6J-KitW-42J/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• die late in gestation or immediately after birth
• at E12.5, sub-Mendelian ratios are recovered

reproductive system
N
• testes differentiation is not delayed

hematopoietic system




Genotype
MGI:2167486
ht2
Allelic
Composition
KitW-42J/Kit+
Genetic
Background
C57BL/6J-KitW-42J/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

KitW-42J/Kit+

endocrine/exocrine glands

hematopoietic system
• mild, normochromic, macrocytic anemia

integument
• white coat with some dark pigmentation on the ears
• sporadic incidence of patches of pigmented hair around ears and eyes or rump
• mosaicism for large, sharply defined pigmented area
• attributed to heterogeneity for wild-type allele

pigmentation
• white coat with some dark pigmentation on the ears
• sporadic incidence of patches of pigmented hair around ears and eyes or rump
• mosaicism for large, sharply defined pigmented area
• attributed to heterogeneity for wild-type allele

reproductive system
N
• testes differentiation is not delayed




Genotype
MGI:3813818
ht3
Allelic
Composition
KitW-42J/Kit+
Genetic
Background
involves: C57BL/6 * C57BL/6J * WB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• mice exhibit fewer mast cells in the skin than wild-type mice

pigmentation

hematopoietic system
• mice exhibit fewer mast cells in the skin than wild-type mice

integument




Genotype
MGI:3813817
ht4
Allelic
Composition
KitW-42J/KitW
Genetic
Background
involves: C57BL/6 * C57BL/6J * WB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW mutation (10 available); any Kit mutation (182 available)
KitW-42J mutation (1 available); any Kit mutation (182 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• mice exhibit no mast cells in the skin
• mast cells do not survive co-culture with fibroblast cells and exhibit impaired attachment

pigmentation
• mice are black-eyed with white coats

hematopoietic system
• mice exhibit no mast cells in the skin
• mast cells do not survive co-culture with fibroblast cells and exhibit impaired attachment

integument
• mice are black-eyed with white coats




Genotype
MGI:3813693
ht5
Allelic
Composition
KitW-39J/KitW-42J
Genetic
Background
involves: C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-39J mutation (2 available); any Kit mutation (182 available)
KitW-42J mutation (1 available); any Kit mutation (182 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• fewer than expected mice are born alive

reproductive system
• ovaries contain fewer developing follicles than in wild-type mice
• mice lack spermatogenic activity

endocrine/exocrine glands
• ovaries contain fewer developing follicles than in wild-type mice

pigmentation
• mice are black-eyed with white coats

integument
• mice are black-eyed with white coats




Genotype
MGI:3716809
cx6
Allelic
Composition
KitW-42J/KitW-42J
X/SryAKR/J
Genetic
Background
involves: AKR/J * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
SryAKR/J mutation (6 available); any Sry mutation (54 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

reproductive system
• 1 male with bilateral testes was born that had minor internal genitalia abnormalities including: right testis is smaller than left, right epididymis' cauda was not completely formed and the average length of the testes was smaller relative to wild-type




Genotype
MGI:3716808
cx7
Allelic
Composition
KitW-42J/Kit+
X/SryAKR/J
Genetic
Background
involves: AKR/J * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
SryAKR/J mutation (6 available); any Sry mutation (54 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
• males have right testis smaller than the left, especially when the alleles are inherited from the mother
• one hermaphrodite was found with a left testicular gonad and a contralateral putative ovotestis that was associated with both Mullerian and Wolffian duct derivatives

endocrine/exocrine glands
• males have right testis smaller than the left, especially when the alleles are inherited from the mother




Genotype
MGI:3716810
cx8
Allelic
Composition
KitW-42J/Kit+
X/SryPOS-TIR
Genetic
Background
involves: C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-42J mutation (1 available); any Kit mutation (182 available)
SryPOS-TIR mutation (0 available); any Sry mutation (54 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
• 2 were identified
• all XY mice are female





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last database update
12/10/2024
MGI 6.24
The Jackson Laboratory