122 
Y. TANAKA. 
of the cross may be represented thus : 
P (1910) Normal white x Plain yellow 
NyNy | nYnY 
F t (1911) 
Gamete 
F., (1912) 
The experimental results set forth above seem sufficient to support the 
assumption that there occurs a complete repulsion between two dominant 
characters, normal mar king- (X) and yellow colour (Y), in the heterozygotes 
derived from a cross, normal white (NyNy) x plain yellow (nYnY). 
Below is given a summary of the results produced by these heterozygous 
normal yellows mated inter se in 1911. 
Normal yellow 
NynY 
Ny I nY 
123 normal yellow 88 normal white 61 plain yellow 
NynY NyNy nYnY 
2 : 1:1 
Lot 
No. Noi 
•mal yellow 
Normal white 
Plain yellow 
Total 
N. 
4 . ’ll 
168 
77 
81 
326 
N. 
4 2 . ’ll 
154 
72 
62 
288 
N. 
4\ ’ll 
136 
86 
68 
290 
N. 
2. ’ll 
80 
30 
28 
138 
N. 
5. ’ll 
123 
88 
61 
272 
Total 
661 
353 
300 
1314 
Expectation 
657.0 
328.5 
328.5 
1314. 
Thus tht' actual figures closely accord with the theoretical numbers 
calculated on the assumption which we have stated above. 
II. Complete repulsion between stripedness (S) and yellowness (Y). 
A batch of the cross homozygous Japanese normal white (Aojiku) ^ x 
heterozygous striped yellow (S. 5.’ 11) 'g' produced in 1912 the following 
offspring : 
