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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    •• -щ • t PROMETHEUS be inherited. The development of each, under the conditions, is due to some peculiarity of the germinal constitution of the stock in which it occurs. When it is found (as WÜ1 be the case) that, in crosses, A and В behave in accord with Mendelian rules, the test for inheritance is complete. Following this usage, we may tum to certain inherited characters. In that animal whose heredity is better known than is that of any other organism, the fruit fly, individuals occur with hereditary abnormalities. The abdomen is irregular, deformed ; the joints between the segments are imperfect. This is sharply inherited as a sex-linked character, so that it is known to be due to a peculiarity of one of the genes in the x-chromosome. If the father has this abnormality, all [50]