On the Science and Logic thread, Ed T linked to an article about potential elimination of a 3% risk of genetic defects in human reproduction. That reminded me of a question I have been meaning to ask: just (or, about) how accurate is the copying of genes in human reproduction? Is that "3% risk" essentially the same as saying that there is approximately a 3% chance that a given gene will be miss copied? Or is miss copying much more common, with most "mistakes" being harmless? Or am I asking something that would take 412 pages to answer in a meaningful way?
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