Breeding Chocolate Labrador RetrieversCoat Colour Inheritance  Genetics
Is this hard to understand? Look here to see the explanation of genetics and passing on coat colour traits. All Pairings that will give Chocolate Coat Colour Chocolate to Black PairingsbbEE x BbEE will give the probability of 1/2 chocolate & 1/2 black.bbEE x BbEe will give the probability of 1/2 chocolate & 1/2 black. bbEe x BbEE will give the probability of 1/2 chocolate & 1/2 black. bbEe x BbEe will give the probability of 3/8 chocolate, 1/4 yellow, 3/8 black (a rainbow litter). Black to Black PairingsHow do two black dogs produce chocolate puppies? Both must be carrying a chocolate gene.BbEE x BbEE will give the probability of 1/4 chocolate. BbEE x BbEe will give the probability of 1/4 chocolate. BbEe x BbEe will give the probability of 3/16 chocolate, 4/16 yellow, 9/16 black (a rainbow litter). Yellow to Black PairingsBbee x BbEE will give the probability of 1/4 chocolate & 3/4 black.Bbee x BbEe will give the probability of 1/8 chocolate & 3/8 black & 1/2 Yellow (a rainbow litter). bbee x BbEE will give the probability of 1/2 chocolate & 1/2 black. bbee x BbEe will give the probability of 1/4 chocolate, 1/2 yellow, 1/4 black (a rainbow litter). Chocolate to Chocolate PairingsWARNING: Watch out for increased Risk of hereditary problems such as Hip Dysplasia, OCD, PRA.bbEE x bbEE will give 100% chocolate puppies. bbEE x bbEe will give 100% chocolate puppies. One half will carry yellow. bbEe x bbEe will give the probability of 3/4 chocolate pups, and 1/4 pale yellow pups. Chocolate to Yellow PairingsWARNING:Watch out for increased Risk of hereditary problems such as Hip Dysplasia, OCD, PRA.bbEE x Bbee will give the probability of 1/2 chocolate & 1/2 black. bbEE x bbee will give 100% chocolate. bbEe x Bbee will give the probability of 1/4 chocolate, 1/2 yellow, 1/4 black (a rainbow litter). bbEe x bbee will give the probability of 1/2 chocolate, 1/2 yellow with a brown nose. (Yellow to Yellow will only ever produce yellow.)  
