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The chicken (Gallus gallus domesticus) is a large and round short-winged bird, domesticated from the red junglefowl of Southeast Asia around 8,000 years ago. Most chickens are raised for food, providing meat and eggs; others are kept as pets [1] or for cockfighting.
Chickens were created when red junglefowl were domesticated for human use around 8,000 years ago [2] as subspecies Gallus gallus domesticus. They are now a major source of food for humans. However, undomesticated red junglefowl still represent an important source of meat and eggs in their endemic range.
Breed broiler is any chicken (Gallus gallus domesticus) that is bred and raised specifically for meat production. [1] Most commercial broilers reach slaughter weight between four [2] and six weeks of age, although slower growing breeds reach slaughter weight at approximately 14 weeks of age. Typical broilers have white feathers and yellowish skin.
Junglefowl are the only four living species of bird from the genus Gallus in the bird order Galliformes, and occur in parts of South and Southeast Asia.One of the species in this genus, the red junglefowl, is of historical importance as the direct ancestor of the domestic chicken, although the grey junglefowl, Sri Lankan junglefowl and green junglefowl are likely to have also been involved. [2]
Gallus gallus domesticus The Mericanel della Brianza is a breed of small chicken or bantam from Lombardy , in northern Italy. It takes its name from the Brianza , an area to the north-east of Milan , and from mericanell , a Lombard diminutive of merican "American". [ 1 ]
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 ...
Gallus gallus domesticus; Barred cock and hen, illustration from Jean Bungartz, Geflügel-Album, 1885 Egg. The Plymouth Rock is an American breed of domestic chicken.
Gallus gallus domesticus The Sussex is a British breed of dual-purpose chicken , reared both for its meat and for its eggs . Eight colours are recognised for both standard-sized and bantam fowl.