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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Rw
rump white
MGI:1857317
Summary 5 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
 		Rw/Rw (C3H/HeH x 101/H)F1 MGI:2687075
ht2
 		Rw/Rw+ (C3H/HeH x 101/H)F1 MGI:3026603
ht3
 		Rw/Rw+ involves: 101/H * C3H/HeH MGI:4431061
cx4
 		KitW-v/Kit+
Rw/Rw+ 		involves: 101/H * C3H/HeH * C57BL MGI:4431075
cx5
 		Ph/Ph+
Rw/Rw+ 		involves: 101/H * C3H/HeH * C57BL/Gr MGI:4431079


Genotype
MGI:2687075
hm1
Allelic
Composition		 Rw/Rw
Genetic
Background		 (C3H/HeH x 101/H)F1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rw mutation (3 available); any Rw mutation (4 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
prenatal lethality, complete penetrance ( J:5182 )
• homozygotes die in utero by mid pregnancy




Genotype
MGI:3026603
ht2
Allelic
Composition		 Rw/Rw+
Genetic
Background		 (C3H/HeH x 101/H)F1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rw mutation (3 available); any Rw mutation (4 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
pigmentation
variable body spotting ( J:5021 )
• heterozygotes have white hindlegs and tails and white fur on the posterior part of the abdomen, with occasional pigmented spots in the white areas; the white area is more extensive ventrally than dorsally

integument
variable body spotting ( J:5021 )
• heterozygotes have white hindlegs and tails and white fur on the posterior part of the abdomen, with occasional pigmented spots in the white areas; the white area is more extensive ventrally than dorsally




Genotype
MGI:4431061
ht3
Allelic
Composition		 Rw/Rw+
Genetic
Background		 involves: 101/H * C3H/HeH
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rw mutation (3 available); any Rw mutation (4 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
pigmentation
white spotting ( J:125080 )
• heterozygotes have a white patch of variable shape and size at the posterior extremity of the trunk, largely on the ventral side

integument
white spotting ( J:125080 )
• heterozygotes have a white patch of variable shape and size at the posterior extremity of the trunk, largely on the ventral side




Genotype
MGI:4431075
cx4
Allelic
Composition		 KitW-v/Kit+
Rw/Rw+
Genetic
Background		 involves: 101/H * C3H/HeH * C57BL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
KitW-v mutation (10 available); any Kit mutation (179 available)
Rw mutation (3 available); any Rw mutation (4 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
pigmentation
abnormal coat/hair pigmentation ( J:125080 )
• the top of the head is white and there is some heavily diluted fur on the sides of the head and some dorsal regions of the body

integument
abnormal coat/hair pigmentation ( J:125080 )
• the top of the head is white and there is some heavily diluted fur on the sides of the head and some dorsal regions of the body




Genotype
MGI:4431079
cx5
Allelic
Composition		 Ph/Ph+
Rw/Rw+
Genetic
Background		 involves: 101/H * C3H/HeH * C57BL/Gr
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ph mutation (2 available); any Ph mutation (1 available)
Rw mutation (3 available); any Rw mutation (4 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
pigmentation
abnormal coat/hair pigmentation ( J:125080 )
• the head and shoulder region are almost fully pigmented, but the rest of the body is white although some pigment patches do occur
head spot ( J:125080 )
• a small head spot is occasionally found

integument
abnormal coat/hair pigmentation ( J:125080 )
• the head and shoulder region are almost fully pigmented, but the rest of the body is white although some pigment patches do occur
head spot ( J:125080 )
• a small head spot is occasionally found




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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Send questions and comments to User Support. 		last database update
04/16/2024
MGI 6.23 		The Jackson Laboratory