How did this come about?

Like many of my other critters, my own family tree included, I am very interested in the genetics of everything. Now I know there are split opinions on breeding chinchillas with a lethal factor. Some of you say it is no big deal and others are strictly against it. Personally I do not encourage it and avoid it. Recently I met someone who bred a Wilson white and a mosaic. To my knowledge, this is breeding two whites which creates a lethal factor. I did try to explain this to her. If I'm correct, a Wilson white has the dominant white gene and the recessive standard gene. A white mosaic has the dominant white gene and the recessive beige gene. Breeding these two together creates the fatality, the white, or the standard. Now I am a bit confused, if the parents were as they said, how this baby came about. I thought if he was a tan wrap, then he would have the dominant beige gene and the dominant ebony gene. What are your thoughts on what he is, or what the parents COULD have been if they weren't what they thought or had something else in there.



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