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Lavender (chicken Plumage)
Lavender or self-blue refers to a plumage color pattern in the chicken (''Gallus gallus domesticus'') characterized by a uniform, pale bluish grey color across all feathers. The distinctive color is caused by the action of an autosomal recessive gene, commonly designated as "''lav''", which reduces the expression of eumelanin and phaeomelanin so that black areas of the plumage appear pale grey instead, and red areas appear a pale buff.Crawford, Roy ''Poultry Breeding and Genetics'', Elsevier, 1990 Description The "lavender" gene (''lav'') in the chicken causes the dilution of both black (eumelanin) and red/brown (phaeomelanin) pigments, so according to color background, dilution due to "lavender" gives a sort of plumage color patterns: On an extended black background, this condition causes the entire surface of the body an even shade of light slaty blue, which is the typical phenotype known as '"self-blue"'. On a red/brown color plumage background, lavender gene degrades color ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lavender Orpington Lilac
''Lavandula'' (common name lavender) is a genus of 47 known species of flowering plants in the mint family, Lamiaceae. It is native to the Old World and is found in Cape Verde and the Canary Islands, and from Europe across to northern and eastern Africa, the Mediterranean, southwest Asia to India. Many members of the genus are cultivated extensively in temperate climates as ornamental plants for garden and landscape use, for use as culinary herbs, and also commercially for the extraction of essential oils. The most widely cultivated species, ''Lavandula angustifolia'', is often referred to as lavender, and there is a color named for the shade of the flowers of this species. Lavender has been used over centuries in traditional medicine and cosmetics. Description Plant and leaves The genus includes annual or short-lived herbaceous perennial plants, and shrub-like perennials, subshrubs or small shrubs. Leaf shape is diverse across the genus. They are simple in some commonly cult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polish (chicken)
The Polish or Poland is a European breed of crested chickens known for its remarkable crest of feathers. The oldest accounts of these birds come from The Netherlands; their exact origins are unknown, however. In addition to combs, they are adorned with large crests that nearly cover the entirety of the head. This crest limits their vision, and as a result can affect their temperament. Thus, though normally tame, they may be timid and easily frightened. My Pet Chicken, accessed March 19, 2011. Polish chickens are bred primarily as a show bird, but were originally productive egg layers. Accordingly, Polish rarely go broody and are noted for their white eggs. There are bearded, non-bearded and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgian D'Everberg
The ( nl, Everbergse Baardkriel, italic=no), is a Belgian breed of bantam chicken. It is a tailless variant of the Barbu d'Uccle, and was bred in about 1906 at the Château d'Everberg, at Everberg in the municipality of Kortenberg, between Brussels and Leuven. It is among the most endangered chicken breeds in Belgium, and in 2010 its conservation status was classed as "critical". It is a true bantam, with no large counterpart. Cocks weigh , and hens . The Barbu d'Everberg is listed as a breed by the Entente Européenne Entente, meaning a diplomatic "understanding", may refer to a number of agreements: History * Entente (alliance), a type of treaty or military alliance where the signatories promise to consult each other or to cooperate with each other in case o .... In Britain and in the Netherlands it is considered a variant of the Barbu d'Uccle rather than a separate breed. References Bantam chicken breeds Chicken breeds originating in Belgium Chicken breeds Korten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgian Bearded D'Anvers
The Barbu d'Anvers, nl, Antwerpse baardkriel, italic=no, is a breed of bantam chicken from Belgium. It is a true bantam, and has no full-sized counterpart; males weigh about 700 grams and hens about 600 g. The Barbu d'Anvers is one of the oldest bantam breeds, and is thought to have originated in the province of Antwerp (french: ) in northern Flanders. It is the only Belgian bantam breed not threatened with extinction. In the United States it may be called the Antwerp Belgian or Belgian Bearded d'Anvers. History The Barbu d'Anvers is among the oldest bantam breeds, and derives from small bearded chickens of the Low Countries similar to those depicted in the paintings of Aelbert Cuyp in the seventeenth century. The first reliable written mention of it dates from 1858, and the first description is that of Victor La Perre De Roo in 1882. From about 1890 there was growing interest in the breed, and by 1910 the Club Avicole du Barbu Nain, the breeder's club, had nearly five hundred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araucana
The Araucana ( es, Gallina Mapuche, italic=no) is a breed of domestic chicken from Chile. Its name derives from the Araucanía region of Chile where it is believed to have originated. It lays blue-shelled eggs, one of very few breeds that do so. Breed standards for the Araucana vary from country to country. It may have unusual tufts of feathers on the ears, and may be rumpless, without a tail and tail-bone; in the United States it may for this reason be known as the South American Rumpless. Both ear-tufts and rumplessness are caused by lethal genes, so not all birds display these traits. The Ameraucana breed and "Easter egger" hybrids of the United States, which also lay blue or green eggs, both derive from the Araucana. History The early history of the Araucana is not documented. The birds were commonly seen in South America in the early twentieth century. The Spanish aviculturist Salvador Castelló, who visited Chile in 1914, saw them and named them "Gallina Araucana", as m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cairina Moschata
The Muscovy duck (''Cairina moschata'') is a large duck native to the Americas, from the Rio Grande Valley of Texas and Mexico south to Argentina and Uruguay. Small wild and feral breeding populations have established themselves in the United States, particularly in Florida, Louisiana, Massachusetts, the Big Island of Hawaii, as well as in many other parts of North America, including southern Canada. Feral Muscovy ducks are found in New Zealand, Australia, and in parts of Europe. It is a large duck, with the males about long, and weighing up to . Females are noticeably smaller, and only grow to , roughly half the males' size. The bird is predominantly black and white, with the back feathers being iridescent and glossy in males, while the females are more drab. The amount of white on the neck and head is variable, as well as the bill, which can be yellow, pink, black, or any mixture of these colors. It may have white patches or bars on the wings, which become more noticeable durin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columba Livia
The rock dove, rock pigeon, or common pigeon ( also ; ''Columba livia'') is a member of the bird family Columbidae (doves and pigeons). In common usage, it is often simply referred to as the "pigeon". The domestic pigeon (''Columba livia domestica'', which includes about 1,000 different breeds) descended from this species. Escaped domestic pigeons have increased the populations of feral pigeons around the world. Wild rock doves are pale grey with two black bars on each wing, whereas domestic and feral pigeons vary in colour and pattern. Few differences are seen between males and females. The species is generally monogamous, with two squabs (young) per brood. Both parents care for the young for a time. Habitats include various open and semi-open environments. Cliffs and rock ledges are used for roosting and breeding in the wild. Originally found wild in Europe, North Africa, and western Asia, pigeons have become established in cities around the world. The species is abundant, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meleagris Gallopavo
The wild turkey (''Meleagris gallopavo'') is an upland ground bird native to North America, one of two extant species of turkey and the heaviest member of the order Galliformes. It is the ancestor to the domestic turkey, which was originally derived from a southern Mexican subspecies of wild turkey (not the related ocellated turkey). Description Adult wild turkeys have long reddish-yellow to grayish-green legs. The body feathers are generally blackish and dark, sometimes grey brown overall with a coppery sheen that becomes more complex in adult males. Adult males, called toms or gobblers, have a large, featherless, reddish head, red throat, and red wattles on the throat and neck. The head has fleshy growths called caruncles. Juvenile males are called jakes; the difference between an adult male and a juvenile is that the jake has a very short beard and his tail fan has longer feathers in the middle. The adult male's tail fan feathers will be all the same length. When males a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homeothermy
Homeothermy, homothermy or homoiothermy is thermoregulation that maintains a stable internal body temperature regardless of external influence. This internal body temperature is often, though not necessarily, higher than the immediate environment (from Greek ὅμοιος ''homoios'' "similar" and θέρμη ''thermē'' "heat"). Homeothermy is one of the three types of thermoregulation in warm-blooded animal species. Homeothermy's opposite is poikilothermy. A poikilotherm is an organism that does not maintain a fixed internal temperature but rather fluctuates based on their environment and physical behaviour. Homeotherms are ''not'' necessarily endothermic. Some homeotherms may maintain constant body temperatures through behavioral mechanisms alone, ''i.e.'', behavioral thermoregulation. Many reptiles use this strategy. For example, desert lizards are remarkable in that they maintain near-constant activity temperatures that are often within a degree or two of their lethal critic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Quail
The Japanese quail (''Coturnix japonica''), also known as the coturnix quail, is a species of Old World quail found in East Asia. First considered a subspecies of the common quail, it is now considered as a separate species. The Japanese quail has played an active role in the lives of humanity since the 12th century, and continues to play major roles in industry and scientific research. Where it is found, the species is abundant across most of its range. Currently, there are a few true breeding mutations of the Japanese quail. The breeds from the United States are Texas A&M, English white, golden range, red range, Italian, Manchurian, Tibetan, rosetta, scarlett, roux dilute and golden tuxedo. Taxonomy The Japanese quail was formally described by the Dutch zoologist Coenraad Jacob Temminck and the German ornithologist Hermann Schlegel in 1848 and given the trinomial name ''Coturnix vulgaris japonica''. This species is now placed in the genus ''Coturnix'' that was introduced in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Griscelli Syndrome Type 3
Griscelli syndrome type 3 is a disorder of melanosome transport presenting initially with hypopigmentation.James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. . See also *Griscelli syndrome Griscelli syndrome is a rare autosomal recessive disorder characterized by albinism (hypopigmentation) with immunodeficiency, that usually causes death by early childhood. Researchers have developed three different classifications of the form of ... References External links Disturbances of human pigmentation Syndromes {{Cutaneous-condition-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exon
An exon is any part of a gene that will form a part of the final mature RNA produced by that gene after introns have been removed by RNA splicing. The term ''exon'' refers to both the DNA sequence within a gene and to the corresponding sequence in RNA transcripts. In RNA splicing, introns are removed and exons are covalently joined to one another as part of generating the mature RNA. Just as the entire set of genes for a species constitutes the genome, the entire set of exons constitutes the exome. History The term ''exon'' derives from the expressed region and was coined by American biochemist Walter Gilbert in 1978: "The notion of the cistron… must be replaced by that of a transcription unit containing regions which will be lost from the mature messengerwhich I suggest we call introns (for intragenic regions)alternating with regions which will be expressedexons." This definition was originally made for protein-coding transcripts that are spliced before being translated. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
