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Updated: May 25, 2025
On this view, variation depends largely on the laws of the interaction of the dissimilar characters brought together in cell-union. But what are these laws? The best that can be said is that we are getting to know a little more about them every day. Amongst other lines of inquiry, the so-called Mendelian experiments promise to clear up much that is at present dark.
The development of the individual that results from such cell-union is no mere mixture or addition, but a process of selective organization. To put it very absurdly, one does not find a pair of two-legged parents having a child with legs as big as the two sets of legs together, or with four legs, two of them of one shape and two of another.
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