DOMESTIC VARIETY
Ancestry: Rattus norvegicus 
Standard Ear (Top-eared)
Ear Type
Ears are set on top of the head, standing upright.
Variety Type
Ear Type
Key Traits
Upright ears
Top-set
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Genetic Origin
All domestic rats are descended from the Brown Rat (Rattus norvegicus). Selective breeding has created these unique variations in coat, ears, and size.