Genotype: N / N [ Homozygous normal ]
The dog is noncarrier of the mutant gene.
The dog will never develop Progressive Retinal Atrophy (Dominant PRA) and therefore it can be used in breeding.
Affected dogs can have one of two genotypes:
Genotype: N / PRA [ Heterozygous affected], or
Genotype: PRA / PRA [ Homozygous mutant ]
It is not recommended to use affected dogs in breeding
The dog will develop Progressive Retinal Atrophy (Dominant PRA) and will pass the mutant gene to its offspring