Blue-Eyes Litter

Theoretical Dog GeneticsAs a kid I remember being confused by the logic of dog genetics presented in cartoons. When two dogs had puppies, the boys looked like the dad and the girls looked like the mom. I can only guess that this lack of originality was an attempt to cash in on the new character's resemblance to an older character that had already won people over, but where's the fun in that? Being the animal nerd that I am, I wanted a realistic guide to prevent such blandness.
How to use
Much of this has not yet been proven in studies with real dogs, so if you want to learn more about a real dog it is useful to research the specific breed or likely breeds that are in the dog's background.
Each locus is a spot which can hold two possible alleles out of any number present in the whole species. All together the alleles (genotype) give the final appearance (phenotype). To decide the appearance of offspring, give each parent a full list of genes to describe their appearance and "breed" them by randomly sele

Pedigree
Offspring

Grizzle gene successfully passed but not expressed.