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Barred cock and hen, illustration from Jean Bungartz, Geflügel-Album, 1885 Egg. The Plymouth Rock is an American breed of domestic chicken.It was first seen in Massachusetts in the nineteenth century and for much of the early twentieth century was the most widely kept chicken breed in the United States.
The Dominique is an American breed of chicken, characterized by black-and-white barred plumage and a rose comb. It is considered to be the oldest American chicken breed, [8]: 121 and is thought to derive from birds brought to America by colonists from southern England. It was well known by about 1750, and by the mid-nineteenth century was ...
Illustration of thirty-nine varieties of chicken (and one Guinea Fowl) . There are hundreds of chicken breeds in existence. [1] Domesticated for thousands of years, distinguishable breeds of chicken have been present since the combined factors of geographical isolation and selection for desired characteristics created regional types with distinct physical and behavioral traits passed on to ...
Hollands are a fairly rare breed of large chickens that are dual purpose and originate from America. They are hard to tell from Plymouth rocks and Dominiques, but can be recognized as the Plymouth Rock has colored feet and the Dominique has a rose comb.
The concept of an auto-sexing breed of chicken is due to the geneticist Reginald Punnett, who during the First World War had already proposed the technique of cross-breeding chickens carrying the barred gene (B) with others to produce sex-linked chicks with plumage differences that could easily be distinguished.
The effects of the barred gene are more clearly seen in chicks with pale down. From the late 1920s, auto-sexing breeds were created at the University of Cambridge by cross-breeding Barred Rocks with a wide range of other breeds; the first of these was the Cambar, created by Reginald Punnett in 1928.
The History and the field. The first dunk contest in major American professional basketball came at halftime of the ABA All-Star Game in Denver in 1976 at a time the league desperately needed ...
[4]: 432 His aim was to produce a dual-purpose chicken that would be suitable for meat production and would also lay large white eggs. By cross-breeding of Barred Plymouth Rock and White Leghorn birds, an autosexing breed with barred gray adult plumage was produced. As in other autosexing breeds, the sex of chicks can be distinguished at about ...