INVESTIGATIONS SINCE MENDEL 



549 



testing out Mendelism. In both plants and animals numerous 

 pairs of characters have been found to behave in accordance 

 with Mendelism. In plants alone more than 100 pairs of char- 

 acters of various kinds have been found to behave according 

 to the Mendelian conception. Among plants, color and shape of 



d 



FIG. 478. Mendelism demonstrated in the inheritance of color in the 

 endosperm of Corn, c, ear bearing the F } kernels of the cross between a 

 (white endosperm) and 6 (yellow endosperm), showing dominance of yellow. 

 d, ear bearing F 2 kernels of the cross, showing segregation of color. After East. 



flowers; color, shape, size, and quality of fruit and seeds (Figs. 

 477 and 478); time required to mature; resistance to disease, 

 drought, and cold; and many others have been found to follow 

 Mendel's law. Among live stock Mendelism applies to numerous 

 characters, such as the presence or absence of horns in cattle, the 

 color of the hair in cattle and horses, the character of the comb 



