Mendelism / by R.C. Punnett.

  • Punnett, Reginald Crundall, 1875-1967.
Date:
1912
Catalogue details

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

Credit: Mendelism / by R.C. Punnett. Source: Wellcome Collection.

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    90 MENDELISM chap. given in a brief account of the experiments that have led to it. There exists a monstrous form of sweet-pea in which the flowers are malformed and the stigma protrudes owing to the cleft condition of the keel which normally curves it (cf. Fig. i6a). From its fancied resemblance to Fig. I б a. The cretin sweet-pea. a gaping mouth with a protruding tongue, such a plant has- been termed a cretin. The pollen of a cretin was used to fertilise a sterile plant with normal flowers, and all the resulting Fj plants were normal and fertile. Fertility (J^) is dominant to sterihty (/), and the normal flower (JV) is dominant to the cretin (n). The cross was so made that one factor went in from each parent. An Fg generation was raised from 9 F^ plants and consisted of—