218 



HEREDITY AND SEX 



unt lor the same influences. In this sense, the case is 

 like that of stock that has long been inbred, and has 



jSetf and Cross ttrfi/izaT/on //? Gona. 



Fig. 105. — The oblique line of letters .-l a , B b , C c , D d , E e , gives the self- 

 fertilized sets of eggs; the rest A b , A c , etc., the cross-fertilized sets. A, B, 

 C, D, E = eggs; a, b, c, d, e, = sperm of same individuals. (From unpub- 

 lished work of W. S. Adkins.) 



come to have nearly the same hereditary complex. If 

 this similarity decreases the chances of combination be- 

 tween sperm and eggs, we can interpret the results. Cor- 

 rens' results may come under the same interpretation. 



