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Phenotypes Associated with This Genotype
Genotype
MGI:3844552
Allelic
Composition		 a/a
U/U
Genetic
Background		 Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
a mutation (166 available); any a mutation (468 available)
U mutation (2 available); any U mutation (2 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
pigmentation
darkened coat color ( J:78801 )
• mice are intense black, darker than mice homozygous for nonagouti and closely resembling mice homozygous for ae
• no yellow hairs on or behind the ears or around the nipples and perineum

integument
darkened coat color ( J:78801 )
• mice are intense black, darker than mice homozygous for nonagouti and closely resembling mice homozygous for ae
• no yellow hairs on or behind the ears or around the nipples and perineum

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
12/30/2025
MGI 6.24 		The Jackson Laboratory