The theory of the gene / by Thomas Hunt Morgan.

  • Thomas Hunt Morgan
Date:
1926
Catalogue details

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

Credit: The theory of the gene / by Thomas Hunt Morgan. Source: Wellcome Collection.

    30/392 (page 6)
    THE THEORY OF THE GENE 6 In passing it is important to note two facts. The red and the white F2 individuals are expected to breed trne, because they contain the elements for red, or for white, Fig. 5. A cross between a red-flowered four-o'clock (Mirabilis Jalapa) and a white-flowered four-o'clock, giving pink in F^, and one red, two pink, one white in F2. twice present (Fig, 6), but the pink F2 individuals should not breed true, since they are like the first hybrid genera¬ tion, and contain one red and one white element (Fig. 6). All this turns out to be true when these plants are tested.