456 
Bulletin No. 161.—1914. 
forming gametes 
BfIXy . BfIXy 
while the W. P. R. 9 would be 
BbFfi 2 x 2 Y 2 
forming gametes 
BfixY . bFixY 
The mating would then be represented 
c? BfIXy . BfIXy X 
9 BfixY . bFixY = 
d 71 cf B 2 f 2 IiXxYy, white 
9 9 BbFfliXxYy, white 
In the production of F 2 the Fi white cross-bred male, B 2 f 2 IiXxYy r 
would form gametes of eight sorts: 
BfIXY . Bfixy . BfIXy . BfixY 
Bflxy . BfiXY . BfixY . BfiXy 
while the Fi white cross-bred female, BbFfliXxYy, would form 
gametes of 16 sorts: 
BfIXY . Bfixy . bFIXY . bFixy 
BfIXy . BfixY . bFIXy . bFixY 
BfixY . BfiXY . bFixY . bFiXY 
Bfixy . BfiXy 
This mating would give 128 
zygotic constitutions as follows: 
99 
BbFfI 2 X 2 Y 2 (1), white 
BbFfliXxYy (8), white 
BbFfI 2 X 2 Yy (2), white 
BbFfIiXxY 2 (4), white 
BbFfI 2 XxYy (4), white 
BbFfIiX 2 Y 2 (2), white 
BbFfI 2 XxY 2 (2), white 
BbFfIiX 2 Yy (4), white 
. bFIxy . bFiXy 
individuals possessing 27 different 
d'd' 
B 2 f 2 I 2 X 2 Y 2 (1), white 
BofoliXxYy (8), white 
B 2 f 2 I 2 X 2 Yy (2), white 
B 2 f 2 IiXxY 2 (4), white 
B 2 f 2 l 2 XxYy (4), white 
B 2 f 2 IiX 2 Y 2 (2), white 
B 2 f 2 I 2 XxY 2 (2), white 
B 2 f 2 IiX 2 Yy (4), white 
