182 



PHYSICAL BASIS OF HEREDITY 



C 



d 



f 



Fig. 81. — First spermatocyte division a-c, and the second spermatocyte division d-J in 



the hornet. (.After Meves.) 



in that the second division produces two functional 

 sperms, both female producing. 



Since the male comes from an unfertilized egg, the 



