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Background of Animal Breeding I Origin and Domestication of Farm Animals
Consequences of Domestication
Beginnings of Pedigree Breeding and the Formation of Breed Registry Societies
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actual alleles ancestors animal breeding assortive mating blood bred breed average breeder breeding value bull calves characteristics chromosomes coefficient coefficient of relationship community breeding correlation cows crossbreds culling dams daughters desirable genes domesticated dominance Earl Marshall effects environment environmental epistasis epistatic equal errors estimate example extreme farm animals females fertility gametes genetic genotypes grades grandparents grandsire half herd herdbook hereditary heredity heterosis heterozygosis heterozygous Holstein-Friesian homozygosity homozygous horses ideal important inbred inbreeding increase individual merit inheritance intense kind linebreeding litter livestock males mammals Mendelian milk mutation nearly number of genes offspring outbreeding outcrosses pairs of genes parents pedigree percent percentage pigs population possible poultry practical prepotency probably produce progeny test pure breed purebred races random mating rare recessive genes relationship relatives result sample sex-linked sex-linked genes sheep Shorthorn show ring sire species swine tion traits twins undesired usually variance variations