eee f i | 3 
ee” tho) 
el Ne 
eps. lil ° 
8 lt 
B oe eoee ——» 
ih 
MN —&) 
Fie. 65.— Maturation in Protenor. Male above. A. Spermatogonium. 
B. Synapsis. C. First maturation division. D, D’. Second mat- 
uration division. FE, E’. Two sorts of spermatozoa. 
Female below. A. Odgonium. 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) 
