498 Or^cmisms Are Vroducts of Heredity mid Envirommnt unit ix 





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V^ 



Fig. 446 (left) Mamvioth tobacco. It had nz 

 leaves when photographed. It arose as a vnita- 

 tioji froii/ parent plants like those at the kit 

 in the photo, (yearbook of agriculture, 1936) 



Fig. 447 (above) An Ancon sheep used in 

 breeding experiments. What new character did 

 this sheep possess? This mutation occurred a 

 second time in a Norwegian farmer's flock 

 many years later, (stokrs agricultural experi- 

 ment station ) 



Fig. 448 (left) This mink has an umisual com- 

 bination of white hair and jet black hairs scat- 

 tered in a pattern. The normal mink is brown. 

 This color combination is a dominant mutation 

 and can thus be readily reproduced in the oj]- 

 spring. (ward's natural science establisii- 

 ment) 



