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.

    51/112 (page 47)
    BIOLOGICAL BACKGROUND has many sets of innate or here¬ ditary characters ; the conditions under which he develops determine which set he shaU bring forth. The characteristics that appear under training are as much inherited char¬ acters as are those appearing under other conditions ; for the conditions help determine the characters in the one case as in the other. These sweep¬ ing statements are substantiated by precisely-known facts in many organ¬ isms. To grasp the bearing of these facts, one must keep in mind what sort of characteristics are called hereditary or inherited. If of two sets of individ¬ uals of diverse stock, developing under the same conditions, one has the characteristic A, the other the charac¬ teristic B, then A and В are said to D [49]