Marking
                    Bareback
Reference information
| Name | Bareback | 
|---|---|
| Genotype | h/h, ou h/hn, ou h/he, ou h/h Hms/Hms | 
| Mandatory picture? | No | 
| Frequency (all time) | 2.79 % (1,397 rats) | 
| Frequency (in the last 2 years) | 3.58 % (66 rats) | 
| Average lifespan (all causes) | 22.9 months (♀: 22.9 months – ♂: 22.8 months) | 
Description
N/A.
 
                    


























