2o8 
GENETIC STUDIES OX THE SILKAYORM 
A 6iS'i 5 
9i 
98 
82 
69 
340 
A 61 9'i 5 
97 
98 
104 
1 10 
409 
Totals 
474 
510 
468 
481 
J 933 
Exp. ratio 
1 
: 1 : 
1 
: 1 
The results above 
given 
evidently prove the 
independent transmission 
Z and Y factors. This 
; conclusion is in exact conformity with the results 
obtained by Coutagxe (1903, 
p p. 1 29- 1 30) and by Toyama 
(1906 a). 
Plain-coäted (P). 
a) P and Q. 
PpQq x PpQq 
PQ 
Pq 
dO 
Totals 
A 4s2'i s 
152 
49 
I C 
275 
A : 
183 
59 
A A 
44 
20 
306 
168 
60 
68 
1 O 
3 r 4 
A 45ö'i 5 
168 
48 
40 
■7 
270 
Totals 
671 
216 
217 
70 
I 174 
Exp. ratio 
9 
j 
3 
: 1 
PpQ,q £ ? x ppqq 
Q O 
PQ 
Pq 
py 
IT. 
Totals 
A a rn' t - 
" 459 1 ? 
95 
82 
73 
TC 
/ 3 
3-5 
A 460' 1 5 
85 
86 
99 
85 
355 
Totals 
180 
168 
172 
163 
680 
Exp. ratio 
1 
: 1 : 
1 
: 1 
b) p and s. 
SsPp x SsPp 
SP 
Sp 
sP 
sp 
Totals 
A 63' 1 5 
58 
24 
9 
113 
A 64' 1 5 
49 
19 
1 1 
96 
A 65'is 
7- 
56 
17 
10 
1 55 
Totals 
179 
99 
56 
30 
364 
Exp. ratio 
9 
3 
: i 
