142 
GENETIC STUDIES ON THE SILKWORM 
Pale-quail 2 2 x trihetorozygous striped £ J . 
Striped 
Striped-quail 
Plain 
Pale-quail 
Totals 
A 534'i5 
67 
54 
64* 
248 
A 535 r '5 
5« 
63 
64 
47 
232 
Totals 
125 
1 17 
1 27 
1 1 1 
480 
Expect. 
120 
120 
120 
120 
480 
If S and Q, were not completely coupled together, one should expect such 
combinations as SPq, Spq, sPQ, (normal) and spQ, (quail) to appear in addition 
to those actually produced. The absence of these forms can not be account- 
ed for unless S-Q, coupling is assumed. 
Quite a similar relation is observed between Q, and M. 
F 2 offspring ex the cross moricaud-quail (MpH) x pale-quail (mpq). 
Moricaud-quail 
Pale-quail 
Totals 
A 4 8i'i5 
253 
85 * 
338 
A 482' 1 5 
324 . 
96* 
420 
A 483-i / i5 
261 
86* 
347 
A 483-2'! 5 
210 
/•> " 
286 
Totals 
1048 
343 
1391 
Expect. 
1043 
348 
I39I 
Diheterozygous moricaud-quail (MmppQ,q) 2 x pale-quail (mmppqq) £ . 
Moricaud-quail Pale-quail Total 
A 486'! 5 170 145 315 
Pale-quail (mmppqq) 22 x diheterozygous moricaud-quail (MmppQ,q)JJ . 
Moricaud-quail Pale-quail Totals 
A 484'! 5 131 13 1 * 262 
A 485'! 5 112 114 226 
Totals 243 245 488 
Triple heterozygotes (MmPpQ,q) paired inter se. 
Moricaud Moricaud-quail Plain Pale-quail 
(MPQ) (MpQ) (mPq) (mpq) 
A 476'! 25 296 68 53* 21* 
Totals 
438 
