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BACKGROUND OF ANIMAL BREEDING
Consequences of Domestication
History of Animal Breeding Methods in the United
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actual amount ancestors animals appear association average become blood breed breeder bull cattle cause chance characteristics closely combinations common complete correct correlation cows crosses dairy dams daughters desirable deviations direction domesticated dominance effects environment equal errors estimate evidence example exist expected extreme fact farm females fertility figures four frequency genes genetic grades half herd hereditary heredity homozygous horses ideal important improvement inbreeding increase indicate individual inheritance intense keep kind known least less linebreeding males mating means measure merit mutation nature nearly occur offspring pairs of genes parents pedigree percent population possible practical present probably produce progeny pure purebred races random rare reason records registration relationship relatives result selection sheep sire sometimes species standard swine tend tion United usually variations whole