218 



HEREDITY AND SEX 



under the same influences. In this sense, the case is 

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



j^etf and. Cross MrTi/maTio/i /Jn Qor?^. 



Fig. 105. — The oblique line of letters A", £^ C^ D'^ , E', gives the self- 

 fertilized sets of eggs; the rest A'^, A^, 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. 



