MORGAN AND GOOD ALE, INHERITANCE IN POULTRY H9 



male, No. 784, from (1) did not mature until long. after his sisters were 

 laying, while a change of residence on the part of the writer prevented the 

 accomplishment of the inter se mating. From the cross-mating, however, 

 there were 25 barred (12 $ and 9 5) offspring and 13 black (82) (fig. 1). 

 Expectation on the Spillman-Bateson hypothesis is 28y 2 -9y2- One indi- 

 vidual, a male, with the gray spot reduced to a few plumules was excluded 

 from the count as doubtful. 



( FNb fNB Barred 2 



Fl | fNB fNb " $ 



( FNb fNB Barred 2 9 



J FNb fNb Black 2 8 



Fo - ] fNB f NB Barred $ 1 



(^ fNB fNb " $ j lL 



Fig. 3. — Cross of barred g to t\ black 5 



(la) The 6 black females from (2) were mated to a litter barred 

 brother, Xo. 569, giving 41 young; 16 of which were black (8 $ , 6 2) 

 and 25 barred (6 $ , 10 2 ). (4&) Later, they were bred to No. 784, 

 giving 22 young; 7 were black (0 $ , 12) and 15 barred (5 $ , 12). 

 The combined results of these matings were 63 young, of which 23 were 

 black (8$ , 7 2) and 40 barred (11 $ , 11 2 ) (fig. 2). The departure 

 from the expected ratio of 31^ is considerable. 



