172 
GENETIC STUDIES ON THE SILKWORM. 
g) Triply heterozygous moricaud-quail yellow (MpQYmpqy) £ x 
pale-quail white (mpqympqy ) J . 
Moricaud-quail yellow Pale-quail white Total 
A 4 86'i5 170 145* 315 
h) Palc-quail white (mpqympqy) x triply heterozygous 
moricaud-quail yellow (MpQYmpqy) £$. 
A 4 8 4 'j 5 A 4 8 5 'i 5 
Moricaud-quail yellow MpQY 108 92 
Moricaud-quail white MpQy 23 20 
Pale-quail yellow mpqY 21 * 14 
Pale-quail white m P ( W no* 100 
Totals 262 226 488 
Totals 
200 
43 
35 
2IO 
i) A triply heteroz. moricaud-quail yellow (MpQYmpQy) % x 
a plain white (mPqymPqy ) % . 
Mor. yel. (MPQY) Norm. vvh. (mPQy) Total 
A 1 20' 1 5 
164 
161 
325 
Summary of the abov 
-2 data regarding the M-Y coupling: 
MYmy 
x,MYmy 
MY 
My 
mY 
my 
Total 
Observed 
1 05 1 2 
873 
858 
2949 
15192 
Expect, accord, 
to 7:2:2:7 
10550 
844 
844 
2954 
15192 
Ratio 
25 : 
~> 
7 
Accord, to 
919-5 
2848.5 
1 5 192 
3:1:1:3 
10444.5 
949-5 
Ratio 
1 1 : 
MYmy $ 
1 : 
x mymy 
1 : 
O 
3 
MY 
My 
mY 
my 
Total 
Observed 
'423 
0 
0 
1385 
2808 
Expected 
1404 
0 
0 
1404 
2808 
Ratio 
1 
1 
mymy £ 
y MYmy t 
