Heredity in Animals 



By growing from the seed of selected individuals in this third generation 

 and by keeping careful and complete records of the results, Spillman suc- 

 ceeded in combining in one variety of wheat three important characteristics 

 — the strong stem, the closed head, and the frost-resisting qualities. Using 

 similar methods, breeders combined three or more characters desired in a 

 plant from as many different varieties of ancestors. 



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