234 Experimental Transformation of Species 



this fact to hold for all the pairs of characters which he 

 studied, and he found it to hold without regard to which 

 of the two parents bore the one character or the other (see 

 tables, pages 232 and 233). 



Dominant and Recessive Characters 

 in Animals 



Name of Animal 



Cattle 

 Horse 

 Silkworm 

 Rabbits ] 

 Guinea pig j 

 Cat (in female) 

 Cat (in male) 

 Mice 



Mice ^ 



Rabbits 

 Guinea pig 

 Leghorn poultry- 

 Salamander 

 Canary 

 Poultry 

 Poultry 

 Poultry 

 Poultry 

 Poultry 

 Poultry 

 Poultry 

 Poultry 

 Land snail 

 Pomace flies 



Dominant Character 



Hornlessness 

 Trotting 

 Yellow cocoon 



Short fur 



Black fur 

 Orange fur 

 Normal movements 



Pigmented coat 



White plumage 

 Dark color 

 Crested head 

 Rose comb 

 Short rump 

 White plumage 

 Extra toes 

 Feathered shanks 

 Crested head 

 Brown eggs 

 Broodiness 

 Plain shell 

 Red eyes 



Recessive Character 



Horns 

 Pacing 

 White cocoon 



Angora fur 



Orange fur 

 Black fur 

 Waltzing habit 



White coat 



Pigmented plumage 

 Light color 

 Plain head 

 Single comb 

 Long tail 



Black, buff plumage 

 Normal toes 

 Bare shanks 

 Uncrusted head 

 White eggs 

 Non-broodiness 

 Banded shell 

 White eyes 



Subsequently, systematic experiments along these lines 

 were made with other species of plants and animals. For 

 hundreds of such characters, this general fact holds: of a 

 pair of contrasting characters, one will be found in all the 

 offspring to the apparent exclusion of the other. It is of 

 course impossible to know beforehand which of a given pair 



