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.

    31/112 (page 27)
    BIOLOGICAL BACKGROUND now unaltered, still the red eye does not appear. Now the eye colour follows the distribution of another pair of genes. By successively altering genes of different pairs, or by altering genes of two or more pairs in the same parents, certain general relations of the greatest significance are discovered—^relations which are commonly ignored. A cer¬ tain characteristic, such as the red colour, may, with a given pair of parents, follow a given gene, being inherited according to a particular rule —say the typical Mendelian rule. In other parents it follows a different gene, and is inherited in a different way—perhaps as a sex-linked character. There are fifty or more separate and independent ways by which the character red can be altered, [29]