YOSHIMARO TAN AK. A 
153 
So far as the above results are concerned, the present case is hardly 
distinguishable from the ordinary one of complete repulsion occurring in both 
sexes. Crossings, however, were made reciprocally between F 1 indiv iduals 
recessives, 
which revealed 
till CAll tiOl U Ultil y ACciLUl C 
Crossing F x females 
with recessive males. 
(PayPqY 22 
x PqyPqy $£) 
Normal w 
hite Plain yellow 
Total 
N 1 2 r r 3 
242 
253 
495 
N 1 3'r 3 
261 
250 
511 
N 14/13 
333 
3" 
644 
2? 3 
240 
493 
N i6'i3 
187 
198 
385 
N 1/13 
2l6 
229 
445 
N i8'i3 
152 
121 
273 
N ig'is 
I92 
183 
375 
N 20/13 
237 
242 
479 
N 2 i'i 3 
239 
244 
483 
N 22'l3 
24O 
223 
463 
D 9-2'i4 
80 
71 
151 
P S4-i'i 4 
<38 
136 
274 
P 6i'i4 
167 
I9I 
358 
Grand totals of the results from the cross PQyPqY 2 x PqyPqy J . 
Normal white Plain yellow Total 
Actual numbers 2937 2892 5829 
Expected 2914.5 2914.5 5829.0 
Ratio i : 1 
Only two forms, normal white and plain yellow, were produced from 
the cross PQyPqY 2 x PqyPqy J , so that it is evident that a complete re- 
pulsion between Q and Y occurs in oogenesis. Next let us examine the 
reciprocal cross. 
Crossing F x males with recessive females. 
(PqyPqy 22 x PayPqY $S) 
