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.

    32/112 (page 28)
    PROMETHEUS and each yields a somewhat different rule of inheritance. Or in the same individual two or more of the genes affecting colour may be altered ; then the colour is no longer inherited as a unit character; its inheritance is now of the multiple factor type. In some cases it will follow the rules for two-factor cases ; in others for three, and so on indefinitely, until the inheritance may not be distinguished from the blending t5фe. Such cases are typical. The fact that in an observed instance a characteristic is inherited as a unit character does not show that in other cases it will be so inherited. If a characteristic is observed in a given case to be inherited as a sex-Hnked character, we cannot be certain that it wiU be sex-linked in other cases. If it is recessive in some [30]