ELIMINATION OF SEX CHROMOSOMES 491 
® 
Cluontosomes of Stem 
mothew factar spittdle 
Two tyfoes (AB) of divts- 
ton of above To produce the 
female line A and the male lines 
Polar sfundle of femate 
prcducing egg, A, and male 
jareducing egg, B. 
Division of last 
Somatic Cells of fenuale 
A,and male. B. 
Reduced numer of- 
Chromosomes av Seacual €qg.A; 
and «uv Sfeunalocyte B. 
Divister of Polav Spindle 
w Sonal eqq A, dust 
durscon of Sfurmalecyte B 
 @ 
°° @ @ 
 @ 
Cane Pies eax ux 
002600 ~~ 000000 
xx x x K 
00-0000 ~~ 000000 
x 
e eg Zeuatcriat 
fptatle re 
x 
2 °@ 
A 
@ © 
@ . 
B 
x 
0O0OOQ % x @~2ee8@ 
x 
x % x * x x 
<2 @ ) 8O@ 2? @2000 
B 
of os 
& & Lguatereat ad 
© «6 e 
x Le 
oy Gis € 
A B 
— x 
4 § LE quateriat 6® & 
“os A plate & 
2 @ @ Fetar pody 6 @ 
a] e a] L£G¢ e.0 
DIAGRAM 1 
