Quote:
Originally Posted by Elle  So who had the sire and who had the bitch? If it takes a recessive gene, how do you know this to be a fact? Are you saying that the owners/breeders of these dogs confirmed this? How do you confirm the gene? How do you determine if you will breed it? |
The white gene is recessive. In order for it to be expressed it has to be present in both the dam and the sire.
Using Punnett squares, you will see the following:
Two traditional colored yorkies without the parti gene will produce only traditional colored yorkies (4:4).
A traditional colored yorkie bred to a traditional colored parti carrier will have all traditional colored pups, but have a 50% chance of passing the gene on to each off spring (2:4 are traditional without the gene, 2:4 will carry it.)
A traditional colored yorkie without the parti gene bred to a full parti will produce tradtional colored pups that all carry the parti gene (4:4).
Two traditional colored pups with parti genes will have a 1:4 chance of producing a pup without the gene, 2:4 of producing a traditional colored pup with the gene and a 1:4 chance of producing a parti colored yorkie.
Breeding two full parti's will result in only parti's (4:4)