26 THE UNIVERSITY OF OKLAHOMA 



"In this generation there reappear, together with the dominant 

 characters, also the recessive ones with their peculiarities fully 

 developed, and this occurs in the definitely expressed average pro- 

 portion of three to one, so that among each four plants of this 

 generation three display the dominant character and one the re- 

 cessive. This relates without exception to all the characters which 

 were investigated in the experiments. The angular wrinkled form 

 of the seed, the green colour of the albumen, the white colour 

 of the seed-coats and the flowers, the constructions of the pods, 

 the yellow colour of the unripe pod, of the stalk, of the calyx, and 

 of the leaf venation, the umbel-like form of the inflorescence, 

 and the dwarfed stem, all reappear in the numerical proportion 

 given, without any essential alteration. Transitional forms were 

 not observed in any experiment." 



"Expt. 1. Form of seed. — From 253 hybrids 7,324 seeds were 

 obtained in the second trial year. Among them were 5,474 round 

 or roundish ones and 1,850 angular wrinkled ones. Therefrom the 

 ratio 2.96 to 1 is deduced." 



"Expt. 2. Colour of albumen. — ^258 plants yielded 8,023 seeds, 

 6,022 yellow, and 2,001 green; their ratio, therefore, is as 3.01 to 1.'" 



"Expt. 3. Colour of the seed-coats. — Among 929 plants 705 

 bore violet- red flowers and grey-brown seed-coats ; 224 had white 

 flowers and white seed-coats, giving the proportion 3.15 to 1." 



"Expt. 4. Form of pods. — Of 1,181 plants 882 had them simply 

 inflated, and in 299 they were constricted. Resulting ratio, 2.95 

 to 1." 



"Expt. 5. Colour of the unripe pods. — The number of trial 

 plants was 580, of which 428 had green pods and 152 yellow ones. 

 Consequently these stand in the ratio 2,82 to 1." 



'Expt. 6. Position of flowers. — Among 858 cases 651 had in- 

 florescences axial and 207 terminal. Ratio 3.14 to 1." 



"Expt. 7. Length of stem. — Out of 1,064 plants, in 787 cases 

 the stem was long, and in 277 short. Hence a mutual ratio of 

 2.84 to 1. In this experiment the dwarfed plants were carefully 

 lifted and transferred to a special bed. This precaution was neces- 

 sary, as otherwise they would have perished through being over- 

 grown by their tall relatives. Even in their quite young state they 

 can be easily picked out by their compact growth an thick dark- 

 green foliage." 



"If now the results of the whole of the experiments be brought 

 together, there is found, as between the number of forms with 

 the dominant and recessive characters, an average ratio of 2.98 

 to 1, or 3 to 1." 



