Studies on Inheritance in Poultry. 
455 
It is thus apparent that among every 32 F 2 individuals, one would 
expect to obtain six barred birds, equally divided between the sexes. 
The results of the 1913 breeding season may now be compared with 
the expectations as follows: 
Character. 
Actual. 
Expected. 
Barred or dark*. 
21 
19.4 
White. 
82 
83.6 
Totals. 
103 
103.0 
It is apparent that there is close accordance between the expected 
results and those actually obtained in the 1913 breeding pens. We 
may, however, consider the second series of matings made in the season 
of 1914. 
Character. 
Actual. 
Expected. 
Barred or dark.. . 
White. 
12 
52 
12 
52 
Totals. 
64 
64 
In these data, the experimental and the theoretical results find 
absolute agreement. It was a matter of chance that exactly 64 birds 
were raised in the 1914 series. 
We may now consider the second possible interpretation of the 
■experimental data. By this hypothesis, it is assumed that the W. L. 
d* contains factor X and the W. P. R. 9 contains factor Y, both X 
and Y being required for the manifestation of black. In accordance 
with this view the W. L. c? would possess the formula 
BzfslsXoVa 
♦When the chicks are young, the barred individuals are invariably dark, and without evident 
pattern. 
