YOSHIMARO TANAKA 
'73 
MY My mY my Total 
Observed 3053 1030 1057 3 I2 9 8269 
Expected 3 100.9 io 33-6 1033.6 3100.9 8269.0 
Ratio 3:1:1:3 
The above results satisfactorily prove the dimorphism of gametic series 
as regards the correlation of the moricaud pattern and the yellow colour. 
Complete coupling takes place in the female, partial, coupling in the male. 
The coupling system in the male is of a low intensity, more or less approxi- 
mating to 3 : 1 : 1 : 3. 
3) Correlation of Striped Marking and Yellow Cocoon Colour. 
A. S-Y Repulsion 
A repulsion phenomenon similar to the one observed to occur between 
Q and Y or between M and Y also occurred when the two dominant charac- 
ters, striped and yellow, are derived from different parents. 
SysY x SysY 
a) F 2 families ex the cross striped white (SmPQy) x moricaud 
yellow (sMPQY) 
Striped yellow 0 Striped white n Moricaud yellow Totals 
O 5 1 — 1 ' 1 4. 30 15 23 68 
O 5 1— 2'i4 122 65 77' 264 
O 5 1 -4 r 1 4 1 16 51 58 225 
O s i— 5'i4 43 15 20 78 
Totals 311 146 178 635 
b) F.j, ex the cross striped white (SPQy) x normal yellow (sPQY) 
Str. yel. Str. wh. Norm. yel. Totals 
A 34^5 61 38 38 137 
A 35'i5 67 31 24 122 
A 36'! 5 108 48 50 206 
Totals 236 117 112 465 
l) Striped-moricaud included. 
