Breeding cattle: domestication & genetics (accessible preview)

Disponível em http://youtu.be/JqZUdLJwqWA

Investigates the reasons why cattle and humans have been linked together for over 30,000 years. Analyzes the anatomy of the cow's stomach, detailing the purpose of each chamber. Visit the Masai with their cattle herds and the sacred cows of India. Introduces the main cattle breed of the 800 breeds developed in England, explaining how artificial selection is used to produce desirable characteristics. Also introduces British dairy cow detailing the working of the udder and teats and the use of genetic engineering to increase milk production. Interviews Eric Schlosser, an author about the development of slaughterhouse methods in America. Also visits a family ranch where cattle are being raised in natural conditions under a grass management system.

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