U THEORY OF EVOLUTION 



bearing. Chance combinations at fertilization 

 give the three classes of individuals of the sec- 

 ond generation. 



The white flowering plants should forever 

 breed true, as in fact they do. The red flowering 



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PARENTS 



Fi 



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Fig. 14. Diagram illustrating the liistory of the factors in ' 

 the germ cells of the cross shown in Fig. 13. 



plants also breed true. The pink flowering 

 plants, having the same composition as the hy- 

 brids of the first generation, should give the 

 same kind of result. They do, indeed, give this \ 

 result i.e. one white to two pink to one red 

 flowered offspring. 



