136 THE BREEDING OF ANIMALS 



spring without apparent modification by the other parent. 

 In this type of inheritance one parent seems to possess a 

 predominating influence in determining the characteristics 

 of the offspring. Many examples of this type of heredity 

 are to be observed among the domestic animals. The 

 white face of the Hereford breed of cattle is invariably 

 transmitted, even when one parent belongs to a widely 

 different breed. The quality of speed in horses is un- 

 doubtedly transmitted, sometimes in accordance with 

 Galton's alternative inheritance. Fecundity in the do- 

 mestic fowl has been shown by Pearl to be transmitted 

 through the male. The hen inherits fecundity directly 

 from the sire. The ability to lay a large number of eggs 

 is not transmitted from the mother to the immediate 

 female offspring, but to her male offspring. 



" Hence if the daughters of high producing hens are 

 selected, one does not get in them the high productiveness 

 of the mother. It is her sons that inherit the character, 

 although they cannot show it except in their offspring." 1 



129. Participate or mosaic inheritance. The char- 

 acters of the parents are often transmitted in such a 

 manner that they are not in any sense blended but appear 

 rather as a mosaic. The color character is frequently 

 inherited as a mosaic. A very good example of this 

 kind of inheritance is seen in the Holstein Friesian breed 

 of cattle. This breed is black and white, these colors 

 appearing in definite, clearly defined areas and not blend- 

 ing. The Holstein Friesian breed was originated by 

 crossing a black breed and a white breed of cattle. The 

 colors black and white in other animals seem to behave 

 in a similar manner. When white hogs are mated with 

 black, the offspring are always spotted. Recently it 



1 Morgan, "Heredity and Sex," p. 213. 



