After yesterday’s post I feel it is important again to reiterate that there is an unfortunate tyranny of the gene-as-physical-entity when it comes to our understanding of human heredity. To clarify what I mean, I think it is useful to borrow a framework from Andrew Brown. On the one hand you have a conventional modern mainstream understanding of the gene as a molecular biological entity, fundamentally derived from DNA and its role as envisaged by Francis Crick and James Watson, but with roots deeper back into the physiological genetic tradition which Sewall Wright was embedded within. In contrast to this concrete and biophysical conception of the gene there are those who conceive of the gene as an abstract unity of analysis. Richard Dawkins is the primary proponent of this viewpoint on the public intellectual scene, though men such as William D. Hamilton self-consciously understood the difference between their own genetics, and that which arose out of the insights of Crick and Watson.
The key point which you have to remember is that the gene was conceived of before its substrate, DNA, was understood. Genes, and therefore genetics, predates molecular biology. …