. Heredity and evolution in plants . FIG. 41.—Mendelian segregation in the edible pea (Pisum sativnm)Full explanation in the text. (Cf., Fig. 42.) 50. Ratio of Segregation.—But now we come to thatfeature of Mendels experiments which, perhaps more than 62 IIEKKDITY AND EVOLUTION IN PLANTS. Fu;. 42.—Mendelian segregation in maize, a, the starchy parent; />,the sweet parent; C, the first hybrid (Fi) generation, produced by crossinga and /), showing the dominance of starchiness; d, the second hybrid (F->)generation, showing the segregation of starchiness and sweetness with theratio of ihrcc
. Heredity and evolution in plants . FIG. 41.—Mendelian segregation in the edible pea (Pisum sativnm)Full explanation in the text. (Cf., Fig. 42.) 50. Ratio of Segregation.—But now we come to thatfeature of Mendels experiments which, perhaps more than 62 IIEKKDITY AND EVOLUTION IN PLANTS. Fu;. 42.—Mendelian segregation in maize, a, the starchy parent; />,the sweet parent; C, the first hybrid (Fi) generation, produced by crossinga and /), showing the dominance of starchiness; d, the second hybrid (F->)generation, showing the segregation of starchiness and sweetness with theratio of ihrcc starchy to one sweet (wrinkled) grain. Lower row, daughtersof (I; e,f, and g resulted from planting starchy grains. One ear in three ispure starchy, the other two mixed; //, result of planting sweet (wrinkled)seed. They are pure recessive?, and the ear is pure sweet. (AfterKust.) (Cf. Fig. 41.) EXPERIMENTAL STUDY OF HEREDITY 63 anything else, made them superior to all others that hadpreceded. He carefully counted the number of plantsbearing each kind of seed, and found that the numberof smooth-seeded plants was to those with wrinkledseeds as 3 : i. 51. Theory of Purity of Gametes.—When the wrinkledseeds (one-fourth of the total crop) were sown they allbred true to wrinkledness
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