INHERITANCE— IMPROVEMENT AT BREEDING 167 



the difference between races, breeds, varieties, or species CHAP, 

 depends on the presence or absence of one or more such 

 characters. 



" The demonstration that there exist definite and separable 



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immi) 



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KM 



Fig. 74. — Segregation of characters in the F 3 seed generation ; A, B, and 

 C, all-black ears. 



