ANIMAL BREEDING 



529 



connection with horse-raising is this : Will the training which 

 the horse gets influence the quality of his offspring? Will a 

 mare that has had track training produce faster colts than a 

 mare who has not had training? Our present knowledge would 

 lead us to say that the mare's training would not influence the 

 offspring. What the training does is to enable the horse-breeder 

 to pick the most promising individuals to be the parents of the 

 next generation. 



ANIMAL BREEDING 



Kinds of animals cultivated by man 







Birds 



Hen 



Turkey 



Duck 



Goose 



Pigeon 



Peafowl 



Guinea fowl 

 (Fish) 



Mammals 

 Horse 

 Ox 

 Sheep 



Pig 

 Dog 



Goat 



Reindeer 



Camel 



Elephant 



Cat 

 Induced variations in animals 

 Why variations are desirable 



Increase chances for new qualities 

 How variations are induced 



Providing most favorable conditions 



Changing conditions 



Training or practice 



Hybridization 

 Instability of variations 

 Fluctuations 

 Acquired characters 

 Hybrids 



Either sterile or split up 

 Laws of heredity 

 Dominance 

 Segregation 

 Recombination 



Insects 



Honeybee 



Silk moth 

 (Crustaceans) 



Lobsters 



Crabs 

 (Mollusks) 



Oysters 



Mussels 



