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Posted by the Ole Advisor IN on May 14, 2008, 11:25 am, in reply to "Re: Is a clone as good as the original?"
165.139.0.20
As I understand it, the fetus closes at what is going to be the linea alba. (This is why sheep that are "Kempy" will have kemp on both sides of the body in the same position) Therefore pigmentation must be produced at a later date. Can anybody tell me why in some breeds of sheep (texel, North Country Cheviot) you can have a pink nosed lamb born from parents that both have black pigmentation of the nose. It is not a case of a simple autosomal ressive. Is it polygenic in gene action, or epistatic, or what? Years ago I saw the cloned Simmy/cross calves, by embryo splitting, that CSU (I think) had at the National Western. They were all different in the amount of white on them.
Also do you think that TH or PHA and "hair", and "thickness" is a case of pleiotropy?
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