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Frizzle-feathered
A frizzle refers to a plumage pattern in domesticated chickens ('' Gallus gallus domesticus'') characterized by feathers that curl outwards, rather than lying flat as in most chickens. The frizzle type is not a separate breed, but a variety within breeds. Though all breeds of chickens may be frizzled; it is most commonly seen in breeds such as the Cochin, Pekin, and Polish. Chickens with this pattern are sometimes referred to as frizzles. The gene which causes the frizzles' peculiar feathering is an incomplete dominant trait. Common Breeds Almost all breeds can be frizzled, but the most common are listed below: * Cochin * Polish * Silkie (Commonly referred to as "Sizzle") * Plymouth Rock * Buff Orpington Bantam Breeds: * Japanese Bantams * Pekin Genetics Research suggests that the frizzled phenotype comes from a mutation within the keratin gene ''KRT75''. A deletion that removed part of exon 5 and intron 5 ameliorated the splice site. This caused a 69 base pair del ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frizzle Chicken (breed)
The Frizzle is a list of chicken breeds, breed of chicken with characteristic curled or Frizzle (chicken plumage), frizzled plumage. While the frizzle gene can be seen in many breeds, such as the Pekin (chicken), Pekin and Polish (chicken), Polish, the Frizzle is recognised as a distinct breed in a number of European countries and Australia. In the United States, frizzled chickens are not considered a breed, and at shows are judged by the standards of the breed they belong to. History The origin of the Frizzle is unknown. The frizzle gene is thought to have originated in Asia; frizzled chickens have been reported from the Far East since the eighteenth century. The Frizzle breed is the result of selective breeding for exhibition. It is recognised in nine European countries: Belgium, Czech Republic, France, Germany, Ireland, Italy, Poland, Slovakia and the United Kingdom. Characteristics The gene for the curling of the feathers is Dominance (genetics)#Incomplete dominance, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Bantam
The Japanese Bantam or Chabo () is a Japanese breed of ornamental chicken. It is a true bantam breed, meaning that it has no large fowl counterpart. It characterised by very short legs – the result of hereditary chondrodystrophy – and a large upright tail that reaches much higher than the head of the bird. History The origin of the Chabo is unknown. Mitochondrial DNA evidence suggests that it, and all other Japanese breeds of ornamental chicken, derived through selective breeding from fighting chickens, the ancestors of the modern Shamo breeds. The earliest recognisable depiction of a Chabo in Japanese art dates from the beginning of the seventeenth century; a short-legged chicken with tall upright tail shown in the ''Portrait of Jacoba Maria van Wassenaer'' by Jan Steen, painted in about 1660, is believed to be a Chabo. Japan was effectively closed to all foreign trade from 1636 until about the time of the Meiji Restoration in 1868. The first documented exports of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frizzle (chicken Breed)
The Frizzle is a breed of chicken with characteristic curled or frizzled plumage. While the frizzle gene can be seen in many breeds, such as the Pekin and Polish, the Frizzle is recognised as a distinct breed in a number of European countries and Australia. In the United States, frizzled chickens are not considered a breed, and at shows are judged by the standards of the breed they belong to. History The origin of the Frizzle is unknown. The frizzle gene is thought to have originated in Asia; frizzled chickens have been reported from the Far East since the eighteenth century. The Frizzle breed is the result of selective breeding for exhibition. It is recognised in nine European countries: Belgium, Czech Republic, France, Germany, Ireland, Italy, Poland, Slovakia and the United Kingdom. Characteristics The gene for the curling of the feathers is incompletely dominant over normal plumage; not all members of the breed have frizzled feathers. Frizzled birds are heterozygous f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicken
The chicken (''Gallus gallus domesticus'') is a domesticated subspecies of the red junglefowl (''Gallus gallus''), originally native to Southeast Asia. It was first domesticated around 8,000 years ago and is now one of the most common and widespread domesticated animals in the world. Chickens are primarily kept for chicken as food, their meat and egg as food, eggs, though they are also kept as pets. As of 2023, the global chicken population exceeds 26.5 billion, with more than 50 billion birds produced annually for consumption. Specialized breeds such as broilers and laying hens have been developed for meat and egg production, respectively. A hen bred for laying can produce over 300 eggs per year. Chickens are social animals with complex vocalizations and behaviors, and cultural references to chickens, feature prominently in folklore, religion, and literature across many societies. Their economic importance makes them a central component of global animal husbandry and agricu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plumage
Plumage () is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, there can be different colour morph (zoology), morphs. The placement of feathers on a bird is not haphazard but rather emerges in organized, overlapping rows and groups, and these are known by standardized names. Most birds moult twice a year, resulting in a breeding or ''nuptial plumage'' and a ''basic plumage''. Many ducks and some other species such as the red junglefowl have males wearing a bright nuptial plumage while breeding and a drab ''eclipse plumage'' for some months afterward. The painted bunting's juveniles have two inserted moults in their first autumn, each yielding plumage like an adult female. The first starts a few days after fledging replacing the ''juvenile plumage'' with an ''auxiliary formative plumage''; the second a month o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poultry Show
A poultry show is a specific subset of a livestock show that involves the exhibition and competition of exhibition poultry, which may include chickens, domestic ducks, domestic geese, domestic guineafowl and domestic turkey. Domestic pigeon are also exhibited but not universally considered poultry. As well as being independent events, they are also sometimes held in conjunction with agricultural shows. Preparation Significant effort is put into exhibiting poultry. Birds are trained for the cages used at shows, and washed and manicured in preparation for an event. History The first poultry show in the United Kingdom was in 1845 in London. The exhibition of poultry was promoted as an alternative to cock fighting in the United Kingdom following the banning of such activities in 1849. The first poultry standard in the world was produced in 1865, the British Poultry Standard. The height of the poultry showing in the United Kingdom was during the late 19th and early 20th centu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Livestock Show
A livestock show is an event where livestock are exhibited and judged on certain phenotypical breed traits as specified by their respective breed standard. Species of livestock that may be shown include pigs, cattle, sheep, goats, horses, llamas and alpacas. Poultry such as chickens, geese, ducks, turkeys and pigeons are also shown competitively. A livestock show may be part of an agricultural show An agricultural show is a public event exhibiting the equipment, animals, sports and recreation associated with agriculture and animal husbandry. The largest comprise a livestock show (a judged event or display in which selective breeding, bree .... References {{reflist3. “Livestock.” Livestock , San Antonio Stock Show & Rodeo, www.sarodeo.com/livestock. 4. ''Judging Livestock during the 1950s and 60s'', livinghistoryfarm.org/farminginthe50s/crops_11.html Livestock Poultry Animal shows ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base Pair
A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. Dictated by specific hydrogen bonding patterns, "Watson–Crick" (or "Watson–Crick–Franklin") base pairs (guanine–cytosine and adenine–thymine) allow the DNA helix to maintain a regular helical structure that is subtly dependent on its nucleotide sequence. The Complementarity (molecular biology), complementary nature of this based-paired structure provides a Redundancy (information theory), redundant copy of the genetic information encoded within each strand of DNA. The regular structure and data redundancy provided by the DNA double helix make DNA well suited to the storage of genetic information, while base-pairing between DNA and incoming nucleotides provides the mechanism through which DNA polymerase replicates DNA and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Splice Site
RNA splicing is a process in molecular biology where a newly-made precursor messenger RNA (pre-mRNA) transcript is transformed into a mature messenger RNA (mRNA). It works by removing all the introns (non-coding regions of RNA) and ''splicing'' back together exons (coding regions). For nuclear-encoded genes, splicing occurs in the nucleus either during or immediately after transcription. For those eukaryotic genes that contain introns, splicing is usually needed to create an mRNA molecule that can be translated into protein. For many eukaryotic introns, splicing occurs in a series of reactions which are catalyzed by the spliceosome, a complex of small nuclear ribonucleoproteins ( snRNPs). There exist self-splicing introns, that is, ribozymes that can catalyze their own excision from their parent RNA molecule. The process of transcription, splicing and translation is called gene expression, the central dogma of molecular biology. Splicing pathways Several methods of RNA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intron
An intron is any nucleotide sequence within a gene that is not expressed or operative in the final RNA product. The word ''intron'' is derived from the term ''intragenic region'', i.e., a region inside a gene."The notion of the cistron .e., gene... must be replaced by that of a transcription unit containing regions which will be lost from the mature messenger – which I suggest we call introns (for intragenic regions) – alternating with regions which will be expressed – exons." (Gilbert 1978) The term ''intron'' refers to both the DNA sequence within a gene and the corresponding RNA sequence in RNA transcripts. The non-intron sequences that become joined by this RNA processing to form the mature RNA are called exons. Introns are found in the genes of most eukaryotes and many eukaryotic viruses, and they can be located in both protein-coding genes and genes that function as RNA ( noncoding genes). There are four main types of introns: tRNA introns, group I introns, group I ... [...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'' is a shortening of the phrase ''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 b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KRT75
KRT75 is a keratin gene involved in hair shaft structure in mice. In chickens, mutations in ''KRT75'' cause animals to have frizzled Frizzled is a family of atypical G protein-coupled receptor, G protein-coupled receptors that serve as receptors in the Wnt signaling pathway and other signaling pathways. When activated, Frizzled leads to activation of Dishevelled in the cytosol ... feathers. References {{gene-12-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
