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Creeper Chickens
Creeper chickens are characterised by abnormally short legs, so short that the body is carried a few centimetres from the ground. This chondrodystrophy (dwarfism) is caused by a recessive lethal allele, ''Cp''. A number of breeds display the characteristic, among them the Chabo and Jitokku breeds of Japan, the Courte-pattes of France, the Krüper of Germany, the Luttehøns of Denmark, and the Scots Dumpy. History Creeper chickens have been known and described since Renaissance times at least. They have been called by many names, among them bakies, brevicrews, corlaighs, crawlers, creepers, creepies, dumpfries, dumpies and jumpers. In his ''The Variation of Animals and Plants Under Domestication'' of 1868, Charles Darwin writes that creeper chickens were among the types described in a Chinese encyclopaedia compiled from earlier sources and published in 1596. The creeper was described and illustrated in the ''Monstrorum Historia'' of the Bolognese naturalist Ulisse Ald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krüper Hahn Gesperbert
The Krüper is a German breed of creeper chicken. It originates in the former Dutchy of Berg, now the Bergisches Land in western Germany, and is one of three chicken breeds from that area, the others being the Bergische Kräher and the Bergische Schlotterkamm. It belongs to the group of original European creeper breeds. The breed has normal-sized and bantam varieties. History The first description of the breed is found in the "Avium Natura" of Conrad Gesner from 1555.http://www.krueperhuhn.com/ Website of the Sonderverein der Krüper- und Zwergkrüperzüchter von 1904 These chickens have often been found in the former Dutchy of Berg (now "Bergisches Land"), but also in Westfalia and Saxony. After the near-extinction of the French "Courtes-Pattes", this breed could be reconstructed by crossing local French chickens with krupers. The bantam variety, which also had become extinct, has been rebred by crossbreeding with German bantams. Characteristics The most typical feature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bartolomeo Ambrosini
Bartolomeo Ambrosini (1588 – 3 February 1657) was an Italian botanist, physician and naturalist, for over thirty years prefect of the Botanical Garden of Bologna and editor of many of the posthumous works of Ulisse Aldrovandi. Biography Bartolomeo Ambrosini was born in Bologna in 1588. Older brother of Giacinto (1605 - 1672), also a botanist, he earned degrees in philosophy and medicine at the University of Bologna in 1610. Here, as early as 1612, he taught at first logic, then medicine, finally botany from 1619, and after Uterverio's death he was appointed prefect of the natural history museum and botanical garden of Bologna, serving in that position from 1642 until his death. When the plague affected Italy in 1630, he worked hard as a volunteer doctor for his city, also issuing a handbook entitled ''Modo e facile preserva e Cura di Peste''. He died in 1657. Linnaeus dedicated to him the genus ''Ambrosinia'' of the family Araceae, and the Archiginnasio of Bologna keeps two monu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Creeper Chickens
Creeper chickens are characterised by abnormally short legs, so short that the body is carried a few centimetres from the ground. This chondrodystrophy (dwarfism) is caused by a recessive lethal allele, ''Cp''. A number of breeds display the characteristic, among them the Chabo and Jitokku breeds of Japan, the Courte-pattes of France, the Krüper of Germany, the Luttehøns of Denmark, and the Scots Dumpy. History Creeper chickens have been known and described since Renaissance times at least. They have been called by many names, among them bakies, brevicrews, corlaighs, crawlers, creepers, creepies, dumpfries, dumpies and jumpers. In his ''The Variation of Animals and Plants Under Domestication'' of 1868, Charles Darwin writes that creeper chickens were among the types described in a Chinese encyclopaedia compiled from earlier sources and published in 1596. The creeper was described and illustrated in the ''Monstrorum Historia'' of the Bolognese naturalist Ulisse Ald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Game
The Indian Game is a British breed of game chicken, now reared either for meat or show. It originated in the early nineteenth century in the counties of Cornwall and Devon in south-west England. It is a heavy, muscular bird with an unusually broad breast; the eggs are brown. In the United States the name was changed in the early twentieth century to Cornish. A white variant, the White Cornish, was developed there at about the same time, and is much used in modern industrial chicken meat production in many parts of the world, either for cross-breeding to produce hybrid broilers, or to produce fast-growing " game hens". History The breed was developed by Sir Walter Gilbert, of Bodmin in Cornwall, in about 1820. It was intended to be a gamecock, but had no aptitude for cockfighting. It is recognised as "Indian Game" in Australia, by the Poultry Club of Great Britain in the United Kingdom, and by the Entente Européenne in Europe. In the United States the name was change ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comb (anatomy)
A comb is a fleshy growth or crest on the top of the head of some gallinaceous birds, such as domestic chickens. The alternative name cockscomb (with several spelling variations) reflects the fact that combs are generally larger on cock birds than on hens. The comb is one of several fleshy protuberances on the heads of chickens, the others being the wattles and earlobes, which collectively are called caruncles. In turkeys, the caruncles are the fleshy nodules on the head and throat. Chicken combs are most commonly red, but may also be black or dark purple in breeds such as the Silkie or the Sebright. In other species the color may vary from light grey to deep blue or red. The comb may be a reliable indicator of health or vigor and is used for mate-assessment in some poultry species. Types of chicken comb Comb shape varies considerably depending on the breed or species of bird. Of the many types and shapes seen in chicken cocks the principal ones are: * the single comb, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embryo
An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes many cell divisions that produce cells known as blastomeres. The blastomeres are arranged as a solid ball that when reaching a certain size, called a morula, takes in fluid to create a cavity called a blastocoel. The structure is then termed a blastula, or a blastocyst in mammals. The mammalian blastocyst hatches before implantating into the endometrial lining of the womb. Once implanted the embryo will continue its development through the next stages of gastrulation, neurulation, and organogenesis. Gastrulation is the formation of the three germ layers that will form all of the different parts of the body. Neurulation forms the nervous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homozygotes
Zygosity (the noun, zygote, is from the Greek "yoked," from "yoke") () is the degree to which both copies of a chromosome or gene have the same genetic sequence. In other words, it is the degree of similarity of the alleles in an organism. Most eukaryotes have two matching sets of chromosomes; that is, they are diploid. Diploid organisms have the same loci on each of their two sets of homologous chromosomes except that the sequences at these loci may differ between the two chromosomes in a matching pair and that a few chromosomes may be mismatched as part of a chromosomal sex-determination system. If both alleles of a diploid organism are the same, the organism is homozygous at that locus. If they are different, the organism is heterozygous at that locus. If one allele is missing, it is hemizygous, and, if both alleles are missing, it is nullizygous. The DNA sequence of a gene often varies from one individual to another. These gene variants are called alleles. While some gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterozygous
Zygosity (the noun, zygote, is from the Greek "yoked," from "yoke") () is the degree to which both copies of a chromosome or gene have the same genetic sequence. In other words, it is the degree of similarity of the alleles in an organism. Most eukaryotes have two matching sets of chromosomes; that is, they are diploid. Diploid organisms have the same loci on each of their two sets of homologous chromosomes except that the sequences at these loci may differ between the two chromosomes in a matching pair and that a few chromosomes may be mismatched as part of a chromosomal sex-determination system. If both alleles of a diploid organism are the same, the organism is homozygous at that locus. If they are different, the organism is heterozygous at that locus. If one allele is missing, it is hemizygous, and, if both alleles are missing, it is nullizygous. The DNA sequence of a gene often varies from one individual to another. These gene variants are called alleles. While some gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autosomal Dominant
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new (''de novo'') or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes ( autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child (see Sex linkage). Since there is only one copy of the Y chromosome, Y-linked traits cannot be dominant or recessive. Additionally, there are other forms of dominance such as incomplete d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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