I'URTKllK DATA ON llli; Kl'.l ,l( :A TU )N IN SILKWORMS. 
3 
II. 2(J-2'\2 
140 
15 
-3 
48 
226 
11. 29-3'! 2 
300 
35 
.■) J 
91 
459 
H. 29-4' I 2 
38 
40 
55 
372 
H. 29-5'! 2 
36 
41 
94 
513 
H. 29-5' I 2 
242 
50 
34 
54 
370 
II. 29-7' 13 
'95 
31 
29 
39 
294 
H. 29-8' 12 
-75 
37 
36 
63 
411 
Total 
1973 
264 
261 
507 
3005 
Thou<^h the 
results 
appear to tempt 
one to 
supposition that 4 : 
: 4 couplin«;' occurs in this case, this assumption was proved inadequate, as 
it was the case with the supposition of 7 : i coupling in II. i families 
described in tlie preceding page. The actual feature of the gametic dis- 
tribution was first revealed by the following data. 
a) Results of the cross double recessives (plain or Kasuri' whites) ^ 
X diheterozygous striped yellows . 
H. 45-2' 1 2 (plain wh. 
$ X H. 29'i2 -5) 
Striped 
yellow 
88 
Striped 
white 
45 
Normal 
yellow 
55 
Normal 
white 
97 
Total 
285 
Expect, on 2 : I : I : 2 
95 -o 
47-5 
47-5 
95.0 
285.0 
S. \' i"}, {Kasnri \\\\. S^- 
I I. 1-6' I 2, str. yel. (i 2'i 
67 
67 
190 
495 
I'^xpect. on 3 : I : I : 3 
185.6 
61 .9 
61.9 
185.6 
495.0 
S. 2' 1 3 (ditto) 
186 
92 
lOI 
198 
577 
Kxpect. on 2 : I : I : 2 
192.3 
96.2 
96.2 
192.3 
577.0 
S. 3'i3 (ditto) 
204 
61 
80 
181 
526 
Expect, on 3 : I : I : 3 
197.25 
^5-75 
^^5.75 
197.25 
526.00 
S. 8' 1 3 {ArayaJibnc ^ 
37-i'i 2, str. yel. (292'! 
X H. 
39 
33 
148 
333 
Expect, on 3 : I : I : 3 
124.9 
41.6 
41.6 
124.9 
333-0 
1. Kxpectation on such assumption will be 19S3.30 : 270.45 : 270.45 : 480.80. 
2. This is recessive to the normal. 
