A pedigree is built of shapes connected by lines. Pedigrees are used by genetic counselors to help families determine the risk of genetic disease and are used by research scientists in determining how traits are inherited.
A purebred Arabian horse. A pedigreed animal is one that has its ancestry recorded. Often this is tracked by a major registry. The number of generations required varies from breed to breed, but all pedigreed animals have papers from the registering body that attest to their ancestry.
This comes from a visual analogy between the trace of the bird's foot and the three lines used in the English official registers to show the ramifications of a genealogical tree.
Not all purebred animals have their lineage in written form. For example, until the 20th century, the Bedouin people of the Arabian peninsula only recorded the ancestry of their Arabian horses via an oral traditionsupported by the swearing of religiously based Pedigree breeding essay as to the asil or "pure" breeding of the animal.
Conversely, some animals may have a recorded pedigree or even a registry, but not be considered "purebred".
Today the modern Anglo-Arabian horse, a cross of Thoroughbred and Arabian bloodlines, is considered such a case. Purebreds by Pedigree breeding essay edit ] Main article: Purebred dog Pure-breed Zwergschnauzer A purebred dog is a dog of a modern breed of dogwith written documentation showing the individual purebred dog's descent from its breeds' foundation stock [ dubious — discuss ].
In dogs, the term breed is used two ways: New breeds of dog are constantly being created, and there are many websites for new breed associations and breed clubs offering legitimate registrations for new or rare breeds. When dogs of a new breed are "visibly similar in most characteristics" and have reliable documented descent from a "known and designated foundation stock",  then they can then be considered members of a breed, and, if an individual dog is documented and registered, it can be called purebred.
Purebred horses[ edit ] The domestication of the horse resulted in a small number of domesticated stallions possibly a single male ancestor being crossed on wild mares that had adapted to local conditions.
This ultimately produced horses of four basic body types, once thought to be wild prototypes, but now considered to be landraces. Many of these animals were then bred true to original type by selected breeding, though emphasizing certain inherent traits such as a good temperament, suitable to training by humans to a greater degree than others.
In other cases, horses of different body types were cross bred until a desired characteristic was achieved and bred true. Written and oral histories of various animals or pedigrees of certain types of horse have been kept throughout history, though breed registry stud books trace only to about the 13th century, at least in Europewhen pedigrees were tracked in writing, and the practice of declaring a type of horse to be a breed or a purebred became more widespread.
Certain horse breedssuch as the Andalusian horse and the Arabian horseare claimed by aficionados of the respective breeds to be ancient, near-pure descendants from an ancient wild prototype, though mapping of the horse genome as well as the mtDNA and y-DNA of various breeds has largely disproved such claims.
Purebred cats[ edit ] Purebred Himalayan A cat whose ancestry is formally registered is called a pedigreed or purebred cat. Technically, a purebred cat is one whose ancestry contains only individuals of the same breed. A pedigreed cat is one whose ancestry is recorded, but may have ancestors of different breeds.
The list of cat breeds is quite large: Owners and breeders compete in cat shows to see whose animal bears the closest resemblance best conformance to an idealized definition, based on breed type and the breed standard for each breed.
Some original cat breeds that have a distinct phenotype that is the main type occurring naturally as the dominant domesticated cat type in their region of origin are sometimes considered subspecies and in the past received names as such, although this is no longer supported by feline biologists.
Some of these cat breeds with their invalid scientific names for historical interest are:The Problem with Pedigree Dogs. Later, this developed into competitions to find the best specimen of a particular breed. The first Crufts dog show took place in and the idea of a ‘purebred dog’ began to take hold.
Purebred dogs were regarded as somehow better than mixed breed dogs, which were (and still are) referred to as. Why Breeding Pedigree Dogs Is Just Eugenics By Another Name mission unflinchingly in an essay on "correct conformation" for the that goes against the rules of pedigree breeding, a rough.
Sometimes the word purebred is used synonymously with pedigreed, but purebred refers to the animal having a known ancestry, and pedigree refers to the written record of breeding. Not all purebred animals have their lineage in written form. The Problem with Pedigree Dogs. The dog (canis lupis familiaris) The Kennel Club was founded to run dog shows and make the rules for breeding and showing.
It also registers all pedigree dogs and issues pedigree certificates so that a dog’s ancestry can be traced.
Selective Breeding vs Transgenesis Essay example. Selective Breeding vs Transgenesis Selective breeding is a way for humans to nurture desirable traits in plants and animals, but it is much older and less scientific than transgenesis.
Essay about Pedigree Breeding - The purpose of this paper is to discuss the trend of increased health problems in the modern canine being caused by inappropriate breeding practices.