Prot^nor <? 







Pro/eno/ 





t'€ 



Fig. 65. — Maturation in Pro^enor. Male above. A. Spermatogonium. 

 B. Synapsis. C. First maturation division. Z), D'. Second mat- 

 uration division. E, E' . Two sorts of spermatozoa. 



FemaU below. A. Oogonium. B. Synapsis. C. First matura- 

 tion division. D. Second maturation division. E. Egg nucleus 

 and two polar bodies all alike in chromosome content. First polar 

 body is dividing. {From Morgan's Heredity and Sex, published by 

 the Columbia University Press.) (258) 



