1 68 
GENETIC STUDIES ON THE SILKWORM 
Mor. yel. Norm. wh. Totals 
P45-i'i4 138 160 298 
P 53'i4 111 123 234 
Grand totals of the results from the cross MYmy £ x mymy £ : 
Mor. yel. (MY) Non-mor. wh. (my) Total 
Observed 407 442 849 
Expected 424.5 4 2 4-5 849.0 
That a complete coupling occurs between the moricaud and yellow factors 
in the female heterozygotes is thus evident. 
The results of testing the male hybrids follow : 
mymy $ x MYmy $ 
a) Normal white females mated to heteroz. moricaud yellow 
males (mPQ,ymPay x MPa,YmPQ,y ££). 
Mor. yel. 
(MPQY) 
Mor. wh. 
(MPQy) 
Norm. yel. 
(inPQY) 
Norm. wh. 
(inPQy) 
Totals 
H 39-5'' 3 
61 
26 
24 
64 
175 
H S3'i3 
188 
54 
65 
176 
483 
M 4 'i3 
116 
45 
5 1 
1 21 
333 
M 5 ') 3 
162 
78 
69 
159 
468 
P 4 3-i , i4 
134 
52 
44 
99 
329 
P 43-2'H 
1 10 
45 
43 
122 
320 
P 46-i / i4 
130 
57 
60 
160 
407 
P 46-2' 1 4 
138 
59 
52 
129 
378 
P 4S-i'i4 
142 
57 
67 
142 
408 
P 48-2' 1 4 
191 
66 
69 
179 
505 
P $2'14 
174 
59 
78 
200 
511 
A 1 58'! 5 
102 
17 
23 
9i 
233 
Totals 
1648 
615 
645 
164.2 
4550 
b) Plain white females mated to heteroz. moricaud yellow males 
(ex mor. yel. x norm, wh.) (mPqymPqy 5 ? x MPQYmPQy JS )• 
