Licence: In copyright
Credit: Mendelism / by R.C. Punnett. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![rule holds good for all the various pairs of differentiating characters studied by him. Wherever there occurs a pair of differentia- ting characters, of which one is dominant to the other, three possibilities exist:—there are recessives which always breed true to the recessive character: there are dominants which breed true to the dominant character, and are therefore pure: and thirdly, there are dominants which may be called impure, and which on self-fertilisation (or in-breeding where the sexes are separate) give both domin- ant and recessive forms in the fixed proportion of three of the former to one of the latter. We are in a position now to make a general scheme to shew the result of crossing individuals which each General , - . Results of the bear one of a pair of differen- Experiments. tiating characters. If we denote the pure dominant by D, the impure doming ant (which cannot be distinguished in appear- ance from the last) by [D], and the recessive](https://iiif.wellcomecollection.org/image/b21937709_0023.jp2/full/800%2C/0/default.jpg)
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