214 



The J(;iirnal of Heredity 



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r 



EFFECT OF XEM A IN (iUAIN OK COKN 



'I'his fjrain of maize was produced by a pure white strain, which had been 

 ])()llinaled from a red variety. In general pollen has no immediate 

 visible cfTect on the characters of the resulting fruit, but it is now known 

 that it does produce an effect on the endosperm, or starchy part of 

 the seed. This effect, which is known as xenia, can he easily seen in the 

 dark-colored blotches and splashes sj^rinkled over the seed, just under 

 the translucent, seed-coat. (Fig. 10.) 



]xTha]js unfortilizc'fl." Moldcfleiss had 

 the courage to cnunciaLe the followinj^ 

 conclusions : 



"1. The color of c)i^)^ shells shows, 

 after fecundation of the hen by a cock 

 of .some V)reed other than her own, the 

 influence of the jmternal strain; there 

 is, therefore, evidence of xenia. 



"2. The shell ui a l)ird's e}.;j^' is nt)t 

 exclusively a product of the maternal 

 l)arent, but is also acted on by the cells 

 formed after fertilization. The material 

 which ^'oes into it, howt-xi'r. is fiu'nished 

 by the mother's bod)-. 



".V The color characters of the eg^ 

 shell se<.,'re}.,M"ate in the folk)wini.,' j^'enera- 



