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Since then, the keeping of chickens has spread around the world for the production of food with the domestic fowl being a valuable source of both eggs and meat. [28] Since their domestication, a large number of breeds of chickens have been established, but with the exception of the white Leghorn, most commercial birds are of hybrid origin. [18]
Chickens are featured widely in folklore, religion, literature, and popular culture. The chicken is a sacred animal in many cultures and deeply embedded in belief systems and religious practices. [106] Roosters are sometimes used for divination, a practice called alectryomancy.
The chickens laid more eggs and experienced lower mortality and less illness. Upon this discovery, farmers transitioned from expensive animal proteins to comparatively inexpensive antibiotics and B12. Chickens were now reaching their market weight at a much faster rate and at a lower cost.
Scientifically known as Gallus gallus domesticus, chickens are one of the most widespread and common domesticated animals in the world. The global chicken population reached over 33 billion, with ...
The red junglefowl was the primary species to give rise to today's many breeds of domesticated chicken (G. g. domesticus); additionally, the related grey junglefowl (G. sonneratii), Sri Lankan junglefowl (G. lafayettii) and the Javanese green junglefowl (G. varius) have also contributed genetic material to the gene pool of the modern chicken ...
The chicken embryo is a unique model that overcomes many limitations to studying the biology of cancer in vivo. The chorioallantoic membrane (CAM), a well-vascularized extra-embryonic tissue located underneath the eggshell, has a successful history as a biological platform for the molecular analysis of cancer including viral oncogenesis, [8] carcinogenesis, [9] tumor xenografting, [1] [10] [11 ...
In 1950, chickens took roughly 16 weeks to reach the ideal weight for sale. Now, chickens are ready to be processed in half that time , thanks to selective breeding and specialized diets.
Some 10-year-olds sell cookies and lemonade to earn a bit of spending cash, but not Kinley Maner. Kinley, from Thatcher, Arizona, is earning money by raising and selling chickens at the local fair.