You are looking at 1-20 of 660 entries  for:

  • All: artificial selection x
clear all

View:

Overview

artificial selection

The choosing by humans of the genotypes contributing to the gene pool of succeeding generations of a given organism.

artificial selection

artificial selection   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
45 words

... selection the choosing by humans of the genotypes contributing to the gene pool of succeeding generations of a given organism. Examples of artificial selection include size diversity in dog breeds, improvements in grain yields, and fungus resistance. Sometimes called human selection. See dog breeds...

artificial selection

artificial selection   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
101 words

... selection Breeding of plants, animals, or other organisms in which the parents are individually selected in order to perpetuate certain desired traits and eliminate others from the captive population. By this means, most of our domestic crops, livestock, and pets have arisen. Desired traits produced by artificial selection include disease-resistant plants and high milk production in cows. Artificial selection can be accelerated by techniques such as plant tissue culture and the artificial insemination of livestock. When an organism in nature...

artificial selection

artificial selection   Quick reference

A Dictionary of Biomedicine (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...artificial selection The process of selective breeding, the conventional method of genetic engineering. The selection pressure is operated by the plant or animal breeder, rather than natural environmental pressures ( natural selection ). The phenotypic diversity of dogs is a classic example of the variations that can be...

artificial selection

artificial selection   Quick reference

A Dictionary of Plant Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
69 words

... selection Selection by humans of individual plants from which to breed the next generation, because these possess the most marked development of the required attributes. Typically the process is repeated in successive generations until those attributes are fixed in the descendant offspring. Such artificial selection can result in dramatic changes, like those that took place in the domestication of plants from their wild forebears. See also genetic engineering...

artificial selection

artificial selection   Quick reference

A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
46 words

... selection Selection by humans of individual plants or animals from which to breed the next generation, because these individuals exhibit the most marked development of the required attributes. Typically, the process is repeated in successive generations until those attributes are fixed in the descendent...

artificial selection

artificial selection   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
132 words

...artificial selection The modification of species by selective breeding . Animals or plants with desirable characteristics are interbred with the aim of altering the genotype and producing a new strain of the organism for a specific purpose. For example, sheep are bred by means of artificial selection in order to improve wool quality. Traditional breeding techniques have been supplemented, and in many cases supplanted, by more recent methods of genetic engineering , genome editing , genetic testing, and embryo manipulation. Sequencing the genomes of...

Artificial Selection

Artificial Selection   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
3,500 words
Illustration(s):
2

...character variance, while the selection intensity is unchanged by this scale effect from the variance. Response to Artificial Selection It is important to distinguish between artificial selection (choosing parents to improve the value of a desired character) and the actual response to selection, the improvement (if any) in the trait in the next generation. The former represents the within-generation change from selection, while the latter is the between-generation change from selection. No matter how much artificial selection is applied, there will be a...

artificial selection

artificial selection   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... selection Selection by humans of individual plants or animals from which to breed the next generation, because these individuals possess the most marked development of the required attributes. Typically the process is repeated in successive generations until those attributes are fixed in the descendent offspring. Such artificial selection can result in dramatic changes, like those that took place in the domestication of plants from their wild forebears. See genetic engineering...

artificial selection

artificial selection   Quick reference

A Dictionary of Animal Behaviour (2 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
46 words

... selection Evolution of traits through selective breeding, as in the domestication of animals by humans. As Charles Darwin noted in his On the Origin of Species , ‘Breeders habitually speak of an animal’s organisation as something quite plastic, which they can model almost as they...

artificial selection

artificial selection   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... selection The process by which humans breed animals and crops to ensure that future generations have specific desirable characteristics, by exploiting the process of natural selection . Breeders select the most desirable variants in a plant or animal population, and then selectively breed them with other desirable individuals. Examples include particular plants that are resistant to disease, high yielding, or attractive in appearance, and particular breeds of cattle which produce more meat or milk. Breeds of domesticated animals such as dogs, cats,...

artificial selection

artificial selection  

The choosing by humans of the genotypes contributing to the gene pool of succeeding generations of a given organism.
14 Printed Ephemera

14 Printed Ephemera   Reference library

The Oxford Companion to the Book

Reference type:
Subject Reference
Current Version:
2010
Subject:
History, Social sciences
Length:
7,034 words
Publisher:
Oxford University Press
Illustration(s):
1

...define the field, at least it makes a heroic attempt at laying out an impressive range of representative samples and at providing a useful, inevitably selective, series of bibliographies. An underlying problem with this and alternative listings is that they tend to create an artificial homogeneity in which all the selected non-book materials have an equivalent importance. An alternative approach maintains the interest in form, but focuses on the ways in which the separation of blocks of material has come about, in particular through the process of...

20a The History of the Book in Britain, c.1475–1800

20a The History of the Book in Britain, c.1475–1800   Reference library

The Oxford Companion to the Book

Reference type:
Subject Reference
Current Version:
2010
Subject:
History, Social sciences
Length:
6,011 words
Publisher:
Oxford University Press

...In the closing decades of the 15 th century, Caxton offered his customers a luxury product, of interest largely to wealthy members of the aristocratic circles in which he moved. In the centuries that followed, books remained expensive commodities, with prices held artificially high, partly as a result of the restrictive practices employed by a London-based publishing elite. The 1774 Lords ruling was an early step towards making books less expensive and more readily available to a wider social spectrum. As the 18 th century drew to a close,...

Language

Language   Reference library

An Oxford Companion to the Romantic Age

Reference type:
Subject Reference
Current Version:
2009
Subject:
History, modern history (1700 to 1945), Literature
Length:
5,614 words
Publisher:
Oxford University Press

...and verbs, the originals of all the parts of speech, did reflect mental acts in so far as they were the result of sense impressions, but with this change in perspective, language could be seen as the product of a material context. Where Burnett had claimed that language was the artificial construction of extraordinarily gifted individuals, versions of himself cast in primitive times, Tooke believed that ‘artless men’ had developed language. The Diversions abolished the distinction between a language of mind—associated with the classical educated élite—and the...

pedigree selection

pedigree selection  

Artificial selection of an individual to participate in mating based upon the merits of its parents or more distant ancestors.
action selection

action selection  

The decision problem of choosing between several competing goals, when each has conflicting characteristics, time is limited, and the environment is dynamic. Action selection, which is a topic in ...
selection

selection  

The process by which one or more factors acting on a population produce differential mortality and favour the transmission of specific characteristics to subsequent generations. See artificial ...
evolutionary programming

evolutionary programming  

A branch of artificial intelligence that, by analogy with the phenomena of evolution in nature, attempts to develop software through processes of natural selection and reproduction.
family selection

family selection  

Artificial selection of an individual(s) to participate in mating(s) based on the merits of other members of the same family exclusive of parents and ancestors (e.g., full sibs or half sibs).
artificial chromosome

artificial chromosome  

A type of cloning vector that has some features of true chromosomes and is used to clone relatively large fragments of DNA. Bacterial artificial chromosomes (BACs) are based on the F (fertility) ...

View: