THEORY OF EVOLUTION 



141 



producing sperms, as indicated in the diagram 

 (%. 70). 



Fig. 70. Scheme showing the results of fertilizing white 

 hearing eggs (4- kinds) resulting from non-disjunction. The 

 upper half of the diagram gives the results when these eggs 

 are fertilized by normal red bearing, female producing sperm, 

 the lower half by normal, male producing s])erm. 



If such an XX Y female carried white bear- 

 ing Xs (open X in the figures), and tlie male 



