If it is possible to have favourite parts of the rat genome, then this is my favourite. The c-locus gives us many varieties, and probably many more to come. There are three known alleles at this locus:
- C - Full colour, dominant wildtype (ie "no effect")
- ch - "Himalayan" Any combination with ch will be pointed
- c - Albino, completely strips away all pigment
In general, it does not make any real noticable difference whether rats of these varieties below are agouti or non-agouti based, though it is sometimes possible to see this difference in very dark Siamese rats.
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c/c
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Albino - completely white with pink eyes
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c/ch
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Himalayan - white with medium seal points
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ch/ch
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Siamese - warm cream with rich seal points
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