Although your description is apparently sound, there is no necessity
for recessive mutations to be limited to enzymatic genes, nor are
mutations in enzymes limited from being dominant.  Similarly, classical
"structural" genes may be mutated to act as dominant or recessive.
There is little correlation between dominance/recessivity and
enzymatic/structural.  In fact, as we get to know more and more about
how genes act, the dichotomy of enzymatic and structural means less and
less.  There are genes that code for proteins that are both, and there
are jobs that some gene products do that are really neither enzymatic
or structural.
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 * RIMEGate(tm)V10.2áÿ* RelayNet(tm) NNTP Gateway * MoonDog BBS
 * RgateImp.MoonDog.BBS at 12/13/04 4:43:18 PM