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Originally Posted by wayne2075  Hi, there are some questions arising about how plastic or rubber may have caused the mutation to Chocolate. I have studied how mutations are caused. A mutation can be caused from 2 types of radation, or chemical or virus. I know my yorkies were not exposed to radation. I am not sure if this reaction to plastic or rubber in the artifical breeding is the cause only could be. I also know my yorkies do not have ressive genes for chocolate. When I first saw the puppies I was both shocked and dumfounded to see the Chocolate color. Why would both puppies born be chocolate unless this is a true mutation caused by something and not passed down? My yorkies do not have any chocolate in their history and not inbred. Inbreeding might cause defects as the chocolate color and many other undiserable traits. If you question my opinions on this being a mutation, please give me some scientific info that I can research. A photo of Misty the female that had the chocolate puppies is attached. She has 9 champions in her pedigree of the Rothby line. She is now 7 years old. wayne |
This is also my thinking on your theory of DNA mutation causing your choc pups. If, as you say, that the plastic or rubber tubing used to AI your bitch caused a mutation, then it could only cause a mutation in the sperm, not the egg as the eggs dont pass through the tubeing. In your theory, then you would have only 1 recessive mutant gene(the sperm) and you would not get chocolate coloration in the first generation. The puppies would only be carriers of the mutant chocolate gene. So, in your theory, your bitch would have to already be a carrier of the chocolate gene in order to produce choc colored puppies.
Also, the sperm is not in the tube long enough for a mutation to occure.