Marking

Unknown

Reference information

Name	Unknown
Genotype	?/?
Mandatory picture?	Yes
Frequency (all time)	7.46 % (3,668 rats)
Frequency (in the last 2 years)	6.01 % (123 rats)
Average lifespan (all causes)	17.7 months (♀: 18.3 months – ♂: 17 months)

Description

Undetermined or invisible marking (dilution, naked).