Prometheus, or, biology and the advancement of man / by H.S. Jennings.
- Herbert Spencer Jennings
- Date:
- [1925]
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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![BIOLOGICAL BACKGROUND stocks, it may be dominant in others. Feeble-mindedness appears to be in¬ herited at times as a unit character; although nothing can be more certain than that hundreds of genes are required to make a mind—even a feeble mind. It is not surprising that absence or alteration of some one necessary chemical should leave the mind imper¬ fect ; this is all that is shown by unit character inheritance. Doubtless feeble-mindedness is produced in hundreds of different ways—some sorts heritable according to one set of rules, others according to other sets of rules. Colour-blindness in man appears in some cases to behave as a sex-linked char¬ acter ; this does not make it certain that in other cases it will do so. It is a general truth that, even though we have worked out the precise method of [31]](https://iiif.wellcomecollection.org/image/B18032576_0034.JP2/full/800%2C/0/default.jpg)
