I appreciate your valued response. The point that I was trying to make with the 'disconnect' phraseing is that there is not a direct causal linkage between hair color and genetic makeup.
Your response further confirms that premise when you indicate that such other factors have an impact.... [aging, pathological reasons, biochemical reasons, minerals, chemicals, trace elements, drugs, heterochromia, etc (not to mention shaving].
My contention is that it will be impossible for the basic DNAP technology, of perusing anonymous DNA samples for representative SNP patterns, to ever come up with a direct and accurate prediction of hair color. Many other factors must be assessed and included in the final analysis. Such assessments and analysis is not a part of DNAP's expertise.
best regards, frog
p.s. Since you included mouse studies in your response I am whimsically including the following link. Although it is probably irrelevant, it shows that the connection between DNA and pigmentation is not as direct as we seem to think it is.
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