Did Thomas Hunt Morgan believe in evolution?
Yes, I accepted evolution as a fact, but I was skeptical of Darwin's theory of natural selection as the sole mechanism. My work showed that mutations—sudden, discrete changes in genes—provided the raw material for evolution. I argued that selection could act on these mutations, but I cautioned against assuming it explained everything. Some critics claim I rejected natural selection, but that is a misconception. I simply insisted on experimental evidence. In my book *Evolution and Adaptation* (1903), I wrote that we must be cautious about drawing conclusions from field observations alone. The chromosome theory gave evolution a physical basis, but the details of how selection works require rigorous testing, not speculation.
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