20f> 
GENETIC STUDIES ON THE SILKWORM 
Str. wh. 
SPQzy 
1 0 
1 
14 
Norm. zebr. yel. 
sPQZV 
•9 
6 
6 
3i 
Norm. zebr. wh. 
sPQZy 
47 
34 
50 
131 
Norm. yel. 
sPOzY 
,6 
4 
5 
15 
Norm. wh. 
sPQzy 
IO 
13 
18 
41 
Totals 
302 
255 
289 
846 
( )f which 
SZ 477 
Sz 1 5 1 
: sZ 162 
sz 56 
Exp. ratio 
9 
j 
"1 
: 1 
Heterozygous striped-zebra yellow (SsPPQAZzYy) %% x 
pale-quail white (ssppqqzzyy) SS • 
A 5 5 8' 1 5 A 5 59' 1 5 A 560' 1 5 Totals Ratio 
Str. zebr. ye 
1. SPQZY 
109 
100 
73 
282 
1 
Str. yel. 
SPQzY 
117 
102 
89 
308 
1 
Norm. zebr. 
wh. sPQZy 
9 [ 
89 
75 
255 
1 
Norm. wh. 
sPQzy 
89 
1 1 1 
94 
294 
1 
Totals 
406 
402 
331 
1 139 
Pale-quail white (ssppqqzzyy) x heterozygous striped- 
zebra yellow (SsPPaaZzYy) %% . 
A 556'iS 
A 557'i 
5 Totals 
Str. zebr. yel. 
SPQZY 
14 
42 
56 
Str. zebr. wh. 
SPQZy 
3 
12 
15 
Str. yel. 
SPQzY 
19 
39 
58 
Str. wh. 
SPQzy 
5 
12 
17 
Norm. zebr. yel. 
sPQZY 
3 
12 
'5 
Norm. zebr. wh. 
sPQZy 
21 
47 
68 
Norm. yel. 
sPQzY 
4 
12 
. 16 
Norm. wh. 
sPQzy 
18 
39 
57 
Totals 
87 
215 
302 
( )f which 
SZ 7 J 
: Sz 75 : 
sZ 83 : 
sz 73 
Exp. ratio 
1 
1 : 
1 : 
i 
