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Merle (dog Coat)
Merle is a genetic pattern that can be in a dog's coat. Merle comes in different colors and patterns and can affect all coat colors. The merle gene creates mottled patches of color in a solid or piebald coat, blue or odd-colored eyes, and can affect skin pigment as well. There are two general types of colored patches that will appear in a merle coat: liver (red merle) and black (blue merle). Some breeds that can be affected by this genetic trait are Carea Leonés, Australian Shepherds and Catahoula Leopard Dogs. This genetic trait should be taken seriously when breeding merles. Health issues are more typical and more severe when two merles are bred together, so it is recommended that a merle be bred with a non-merle dog of any other color. Description Merle can affect all coat colors. The merle forms of brown and black are usually called "red" (though this is not correct; red and brown are genetically different) and "blue" as patches of blue are formed throughout the coat. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beauceron
The Beauceron is a herding dog breed originating from the plains of Central France. The Beauceron is also known as Berger de Beauce (sheepdog from Beauce) or Bas Rouge (red-stockings). History A French herding breed known for centuries in western Europe, the Beauceron is noted as one of the breeds used to create the Doberman Pinscher. Although quite different in appearance, the Beauceron and the long-haired sheep dog, the Briard, stem from similar ancestral stock, sharing the trait of double dewclaws on the hind legs. Both were used to herd sheep and cattle. Like the Beauceron, the Briard is found throughout northern France, and despite implications from its name, also did not come exclusively from the Brie region. In 1809, Abbé Rozier wrote an article on these French herding dogs, in which he described the differences in type and used the terms Berger de Brie and Berger de Beauce. In 1893, the veterinarian Paul Megnin differentiated between the long-haired Berger de la Brie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Danes
The Great Dane is a large sized dog breed originating from Germany. The Great Dane descends from hunting dogs from the Middle Ages used to hunt wild boar and deer, and as guardians of German nobility. It is one of the largest breeds in the world along with its relative, the Irish Wolfhound. History Origins In the middle of the 16th century, the nobility in many countries of Europe imported strong, long-legged dogs from England, which were descended from crossbreeds between English Mastiffs and Irish Wolfhounds. They were dog hybrids in different sizes and phenotypes with no formal breed.Ludwig Beckmann (1895)''Geschichte und Beschreibung der Rassen des Hundes'' Volume 1, p. 6 (in German) These dogs were called ''Englische Docke'' or ''Englische Tocke'' – later written and spelled: ''Dogge'' – or ''Englischer Hund'' in Germany. The name simply meant "English dog". Since then, the English word "dog" has come to be associated with a molossoid dog in Germany and France. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retrotransposon
Retrotransposons (also called Class I transposable elements or transposons via RNA intermediates) are a type of genetic component that copy and paste themselves into different genomic locations (transposon) by converting RNA back into DNA through the reverse transcription process using an RNA transposition intermediate. Through reverse transcription, retrotransposons amplify themselves quickly to become abundant in eukaryotic genomes such as maize (49–78%) and humans (42%). They are only present in eukaryotes but share features with retroviruses such as HIV, for example, discontinuous reverse transcriptase-mediated extrachromosomal recombination. These retrotransposons are regulated by a family of short non-coding RNAs termed as PIWI -element induced wimpy testisinteracting RNAs (piRNAs). piRNA is a recently discovered class of ncRNAs, which are in the length range of ~24-32 nucleotides. Initially, piRNAs were described as repeat-associated siRNAs (rasiRNAs) because of thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas A&M University
Texas A&M University (Texas A&M, A&M, or TAMU) is a public, land-grant, research university in College Station, Texas. It was founded in 1876 and became the flagship institution of the Texas A&M University System in 1948. As of late 2021, Texas A&M has the largest student body in the United States, and is the only university in Texas to hold simultaneous designations as a land, sea, and space grant institution. In 2001, it was inducted into the Association of American Universities. The university's students, alumni, and sports teams are known as Aggies, and its athletes compete in eighteen varsity sports as a member of the Southeastern Conference. The university was the first public higher-education institution in Texas; it opened for classes on October 4, 1876, as the Agricultural and Mechanical College of Texas (A.M.C.) under the provisions of the 1862 Morrill Land-Grant Act. In the following decades, the college grew in size and scope, expanding to its largest enrol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and noncoding genes. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incomplete Dominance
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] |
Heterozygote
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 ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merle Dog , a commune in southern France
{{disambiguation ...
Merle may refer to: People *Merle (given name), a given name used by both men and women *Merle (surname), a surname of French origin Others *Merle (dog coat), a pattern in dogs’ coats *Merle (grape), another name for the wine grape Merlot *Akaflieg München Mü17 Merle, a German glider originally built in 1938 for the 1940 Olympics gliding competition * MS ''Phocine'', a ferry formerly named MS ''Merle'' *Merle's Tune, a hymn tune composed by Hal Hopson in 1983 *A Crusader fort near Tantura on the coast of Israel *The French name for the common blackbird See also *Merl (other) *Merles Merles (; oc, Mèrles) is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France. See also *Communes of the Tarn-et-Garonne department The following is a list of the 195 communes of the Tarn-et-Garonne depar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossbreeding
A crossbreed is an organism with purebred parents of two different breeds, varieties, or populations. ''Crossbreeding'', sometimes called "designer crossbreeding", is the process of breeding such an organism, While crossbreeding is used to maintain health and viability of organisms, irresponsible crossbreeding can also produce organisms of inferior quality or dilute a purebred gene pool to the point of extinction of a given breed of organism. A domestic animal of unknown ancestry, where the breed status of only one parent or grandparent is known, may also be called a crossbreed though the term "mixed breed" is technically more accurate. Outcrossing is a type of crossbreeding used within a purebred breed to increase the genetic diversity within the breed, particularly when there is a need to avoid inbreeding. In animal breeding, ''crossbreeds'' are crosses within a single species, while '' hybrids'' are crosses between different species. In plant breeding terminology, the term ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Purebred Dog
A dog breed is a particular strain of dog that was purposefully bred by humans to perform specific tasks, such as herding, hunting, and guarding. Dogs are the most variable mammal on Earth, with artificial selection producing around 450 globally recognized breeds. These breeds possess distinct traits related to morphology, which include body size, skull shape, tail phenotype, fur type, body shape, and coat colour. Their behavioral traits include guarding, herding, and hunting, and personality traits such as hyper-social behavior, boldness, and aggression. Most breeds were derived from small numbers of founders within the last 200 years. As a result, today dogs are the most abundant carnivore species and are dispersed around the world. A dog breed will consistently produce the physical traits, movement and temperament that were developed over decades of selective breeding. For each breed they recognize, kennel clubs and breed registries usually maintain and publish a breed sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breed Standard
In animal husbandry or animal fancy, a breed standard is a description of the characteristics of a hypothetical or ideal example of a breed. The description may include physical or morphological detail, genetic criteria, or criteria of athletic or productive performance. It may also describe faults or deficiencies that would disqualify an animal from registration or from reproduction. The hypothetical ideal example may be called a "breed type". Breed standards are devised by breed associations or breed clubs, not by individuals, and are written to reflect the use or purpose of the species and breed of the animal. Breed standards help define the ideal animal of a breed and provide goals for breeders in improving stock. In essence a breed standard is a blueprint for an animal fit for the function it was bred - i.e. herding, tracking etc. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
