The Supposed Inheritance of Acquired Characters

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DR. FRANCIS DARWIN, in his presidential address before the British Association, writes as follows:— "Fischer showed that when chrysalids of Arctia caja are subjected to a low temperature a certain number of them produce dark-coloured insects; and further that these moths mated together yield dark-coloured offspring. This has been held to prove somatic inheritance, but Weismann points out that it is explicable by the low temperature having an identical effect on the colour-determinants existing in the wing-rudiments of the pupa, and on the same determinants occurring in the germ-cells".

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COCKERELL, T. The Supposed Inheritance of Acquired Characters. Nature 78, 665 (1908) doi:10.1038/078665c0

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