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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Oca2p-6H
pink-eyed dilution 6 Harwell
MGI:1856125
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Oca2p-6H/Oca2p-6H involves: 101/H * C3H/HeH MGI:3055120


Genotype
MGI:3055120
hm1
Allelic
Composition
Oca2p-6H/Oca2p-6H
Genetic
Background
involves: 101/H * C3H/HeH
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Oca2p-6H mutation (2 available); any Oca2 mutation (69 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
pigmentation
• coat color is lighter than in the original pink eye mutants (J:5219)
• same as for p, pink-eyed dilution: yellow on agouti background (J:15082)
• diluted eye color appears pink
• eye pigment is reduced to approximately the same color as in the original pink eye mutants

behavior/neurological
• homozygotes are described as active, nervous and a little uncoordinated
• jerky, hesitant movement

vision/eye
• diluted eye color appears pink
• eye pigment is reduced to approximately the same color as in the original pink eye mutants

reproductive system
• testes are less than half the normal size
• fewer sperm tails are counted in the lumina of the spermatic tubules indicative of a reduced number of spermatogonia and sperm
• a small number of multinucleated giant rounded spermatids can be found in the germinal epithelium
• although maturing follicles are found histologically in ovaries, there is a decrease in the number of corpora lutea
• sertoli cells and spermatogonia are found histologically in testes but no normal mature sperm
• electron microscopy reveals that acrosome development is frequently abnormal, the proacrosome is sometimes duplicated, the proacrosomal vesicle and underlying nuclear membrane are sometimes flattened or irregular in shape and vesicular inclusions can be seen in developing acrosomes
• many spermatids have two or more nuclei and maturing sperm have abnormalities of the head including giant sperm with multiple tails

endocrine/exocrine glands
• testes are less than half the normal size

growth/size/body
• homozygotes are smaller at birth and most weigh less as adults than their littermate controls

skeleton
N
• no malocclusion or dental defects are found

integument
• coat color is lighter than in the original pink eye mutants (J:5219)
• same as for p, pink-eyed dilution: yellow on agouti background (J:15082)

cellular
• electron microscopy reveals that acrosome development is frequently abnormal, the proacrosome is sometimes duplicated, the proacrosomal vesicle and underlying nuclear membrane are sometimes flattened or irregular in shape and vesicular inclusions can be seen in developing acrosomes
• many spermatids have two or more nuclei and maturing sperm have abnormalities of the head including giant sperm with multiple tails
• fewer sperm tails are counted in the lumina of the spermatic tubules indicative of a reduced number of spermatogonia and sperm
• a small number of multinucleated giant rounded spermatids can be found in the germinal epithelium





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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