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Ear Tuft
Ear tufts are a collection of fur or feathers found on animals which can resemble an animal's ear or is near the animal's ear. Cats Ear tufts are not found on all cat breeds. The ear tufts are located on the tips of cat ears and are also known as lynx tipping. Cat ear tufts are often confused with cat ear furnishings which is the fur that comes out of the opening of the ear. Cat ear tufts assist with keeping debris out of the ear and guides sound into the ear canal. Birds Bird ear tufts are skin projections covered in feathers found in some bird species, most notably various species of owl, vaguely resembling mammalian ears, but unrelated to the animal's hearing. Theories about their function range from improved ability to camouflage, aiding in finding a suitable mate, to giving a more threatening appearance to discourage predators. In Araucana chicken In the Araucana breed of chickens, ear tufts are a mutation. It causes a skin projection covered in feathers to appear on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araucana
The Araucana () is a breed of domestic chicken from Chile. The name derives from the historic Araucanía (historic region), Araucanía region 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mutation
In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA. Mutations result from errors during DNA or viral replication, mitosis, or meiosis or other types of damage to DNA (such as pyrimidine dimers caused by exposure to ultraviolet radiation), which then may undergo error-prone repair (especially microhomology-mediated end joining), cause an error during other forms of repair, or cause an error during replication ( translesion synthesis). Mutations may also result from substitution, insertion or deletion of segments of DNA due to mobile genetic elements. Mutations may or may not produce detectable changes in the observable characteristics ( phenotype) of an organism. Mutations play a part in both normal and abnormal biological processes including: evolution, cancer, and the development of the immune system, including junctional diversity. Mutati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inherited Disorder
A genetic disorder is a health problem caused by one or more abnormalities in the genome. It can be caused by a mutation in a single gene (monogenic) or multiple genes (polygenic) or by a chromosome abnormality. Although polygenic disorders are the most common, the term is mostly used when discussing disorders with a single genetic cause, either in a gene or chromosome. The mutation responsible can occur spontaneously before embryonic development (a ''de novo'' mutation), or it can be inherited from two parents who are carriers of a faulty gene (autosomal recessive inheritance) or from a parent with the disorder (autosomal dominant inheritance). When the genetic disorder is inherited from one or both parents, it is also classified as a hereditary disease. Some disorders are caused by a mutation on the X chromosome and have X-linked inheritance. Very few disorders are inherited on the Y chromosome or mitochondrial DNA (due to their size). There are well over 6,000 known genetic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. 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 non-coding genes. During gene expression (the synthesis of Gene product, RNA or protein from a gene), DNA is first transcription (biology), copied into RNA. RNA can be non-coding RNA, directly functional or be the intermediate protein biosynthesis, template for the synthesis of a protein. The transmission of genes to an organism's offspring, is the basis of the inheritance of phenotypic traits from one generation to the next. These genes make up different DNA sequences, together called a genotype, that is specific to every given individual, within the gene pool of the population (biology), population of a given species. The genotype, along with environmental and developmental factors, ultimately determines the phenotype ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gail Damerow
Gail Damerow (born February 29, 1944) is an American author and poultry expert. Born in Colorado, she spent her adult life in various states, including Alaska, California, and finally Tennessee, where Damerow settled down on a farm with her husband in 1982. She has spent much of her time raising farm animals and writing pieces about agriculture, farming, and similar topics in magazines and full-length books she has published from the 1970s through the 2020s. Early life and education Damerow was born on February 29, 1944, in Denver, Colorado. She graduated ''cum laude'' from the University of Arizona with a degree in mathematics. Career Damerow spent some of her early adult life in Alaska, where she was gifted an ice cream freezer in 1966 for Christmas and then bought an ice cream maker and recipe book to complement it. The lack of insightful recipes for the device would form the basis for her later book on the topic. She moved to Sonoma County, California, before later settling in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
