vn DOMINANCE 73 



for the horned character, and of zygotes in which it is 

 completely absent. And since the heterozygous 

 males are horned, while the heterozygous females 

 are hornless, we should expect from this mating 

 equal nuinbers of horned and hornless rams, but only 

 hornless ewes. The result of the experiment con- 

 firmed this expectation. Of the ram lambs 9 were 

 horned and 8 were hornless, while all the 1 1 ewe 

 lambs were completely destitute of horns. 



