GENETIC STUDIES ON THE SILKWORM. 
Grand totals of the results from SysY x SysY. 
Striped yellow Striped white Non-striped Non-striped Total 
(SY) (Sy) yellow (sY) white (sy) 
Observed 547 263 290 o 1100 
Expected 550 275 275 o 1100 
Ratio 2:1:1 
SysY £ x sysy $ 
a) Triply heterozygous striped-moricaud yellow (SmPQysMPQY) 2 2 
x plain white (smPqysmPqy) £ J . 
Str. wh. (SmPQy) Mor. yel. (sMPQY) Totals 
P 38-1*14 118 120 238 
P 38-2' 1 4 81 88 169 
Totals 199 208 407 
b) Triply heterozygous striped-moricaud yellow (SmPOysMPdY ) 
x quail white (smpäysmpCly ). 
Striped white Moricaud yellow Total 
(SmPQy) (sMPQY) 
P39'i4 148 153 301 
Grand totals of the results from the cross SysY 2 x sysy £ : 
Striped yellow Non-striped yellow Total 
(Sy) (sY) 
Observed 347 361 708 
Expected 354 354 708 
sysy 9- x SysY $ 
a) Quail white ( snipftysmpfty) 2 x triply heterozygous striped- 
moricaud yellow (SmPQysMPQY ) £ . 
Str. yel. Str. wh. Mor. yel. Mor. wh. Total 
(SmPOY) (SmPQy) (sMPQY) (sMPQy) 
P40-i'i4 63 177 194 61 495 
b) Quail white ( spöyspQy ) 2 x diheterozygous striped-yellow 
(spayspaY) £ . 
Str. yel. Str. wh. Norm. yel. Norm. wh. Total 
P40-2'i4 49 161 178 58 446 
