MORGAN AND GOOD ALE, INHERITANCE IN POULTRY 13y 



cessive. There are no a priori grounds why a character of this sort may 

 not be dominant, if some other Mendelian characters may also be domi- 

 nant. 



The factor for black, 1ST, is treated in our formulae as present in all of 

 the gametes both of the female and of the male. It is not allelomorphic 

 to barring, B, although its presence in the female-producing egg when 

 barring is present in the correlated male-producing egg may appear to 

 bear this interpretation. From the chromosome point of view black may- 

 be, so far as we know, in other chromosomes than those carrying barring ; 

 hence its more general distribution. 



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