Prometheus, or, biology and the advancement of man / by H.S. Jennings.

  • Herbert Spencer Jennings
Date:
[1925]
Catalogue details

Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

Credit: Prometheus, or, biology and the advancement of man / by H.S. Jennings. Source: Wellcome Collection.

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    THE ADVANCEMENT OF MAN fruits on the vine—the individuals— can multiply without forming new combinations of genes. It simply divides frequently, or gives ofí small pieces, producing thus a great number of individuals like itself—^all with the same identical combination of genes. An individual of vigour thus brings forth thousands like itself ; in time almost or quite the entire population may consist of this single type, while the weak individuals wither and dis¬ appear. This happens on a grand scale in the lower organisms under natural conditions. By the intervention of man, supplying special conditions, almost any type of individual may thus be induced to multiply till an entire population con¬ sists of that single kind. This is what has happened in most of the cultivated [83]