Breeding
1. The act or process of generating or bearing.
2. The raising or improving of any kind of domestic animals; as, farmers should pay attention to breeding.
(1) A weighted combination of traits defining aggregate breeding value for use in an economic selection index.
(2) A general goal for a breeding program--a notion of what constitutes the best animal.
Crossbreed
From Wikipedia, the free encyclopedia
Jump to: navigation, search ...
breeding - the action or process of bearing or generating organisms; in agriculture it usually designates deliberate manipulation of parents to obtain improved offspring ...
Dog breeds were developed through many years of selective breeding by humans.
Biotechnology ...
true-breeding Occurs when self-fertilization gives rise to the same traits in all offspring, generation after generation. Now interpreted as equivalent to homozygous.
Captive Breeding
One last resort is to establish breeding programs in captivity. Many species do not do well in such programs, so alternatives like gene banks must be tried.
Breeding line
A group of identical pure-breeding diploid or polyploid organisms, distinguished from other individuals of the same species by some unique phenotype and genotype.
Related Terms:
Pure-breeding ...
Breed
Group of animals or plants presumably related by descent from common ancestors and phenotypically similar in most traits. Cf. breeding line.
Related Terms:
Phenotype
The term coined by Johannsen (1909) for the appearance (Gk.
Breeding of an organism of unknown genotype with a homozygous recessive individual to determine the unknown genotype. The ratio of phenotypes in the offspring determines the unknown genotype.
testis pl. testes ...
breeder reactor A nuclear reactor that produces fuel by bombarding isotopes of uranium and thorium with high-energy neutrons that convert inert atoms to fissionable ones.
It breeds quickly and often (daily).
It is a vertebrate, like us, and thus can provide clues to human biology that invertebrates like Drosophila and Caenorhabditis elegans may not.
The rice breeders had been looking for this to occur naturally. They'd been looking for a strain of rice that produced beta-carotene, and there actually are some rices that are colored, but it turned out that none of them were producing beta-carotene.
When true-breeding tall stem pea plants are crossed with true-breeding short stem pea plants, all of the _________ plants, and 3/4 of the __________ plants had tall stems. Therefore, tall stems are dominant.
A. F1, F2.
B. G1, G2.
Selective breeding was suggested as early as the time of Plato, who believed that human reproduction should be controlled by authorities.
Mutation breeding: Commonly used practices in plant breeding and other areas in which chemicals or radiation are applied to whole organisms, for example plants, or cells so changes in the organism's DNA will occur.
Mendel used pure-breeding individuals in the first (P1) generation.
P1 yellow X green ...
Wright, Karen. A breed apart; finicky flies lend credence to a theory of speciation. Scientific American. V260. P22(2) Feb, 1989.
Coyne, Jerry A. Orr, H. Allen. Patterns of speciation in Drosophila. Evolution. V43. P362(20) March, 1989.
A broad definition of genetic engineering also includes selective breeding and other means of artificial selection. Genetic linkage map. A linear map of the relative positions of genes along a chromosome.
Eugenics -- the improvement of humanity by altering its genetic composition by encouraging breeding of those presumed to have desirable genes.
In the case of ecosystem functions we look at photosynthesis, nutrient cycling, population control, dispersal mechanisms, temporal patterns of flowering , breeding, dormancy, and so forth.
Species are groupings of individuals which can interbreed. The formation of new species involves isolation and reunion.
Often the handful of breeds of plants and animals hybridized originated in developed countries and were further hybridized with local varieties, in the rest of the developing world, ...
And they breed very, very well. Often a single fish can give you somewhere between 20 and 200 offspring in a single breeding, which is for geneticists just absolutely great.
Next Mendel took the pollen from true breeding tall pea plants, and put it on true breeding short plants. He called these true breeding parent plants the P1 generation.
Eugenics: The idea of improving the quality of human species by selective breeding. Encouraging breeding of those with supposedly good genes is positive eugenics, whereas discouraging those with genes for undesirable traits is negative eugenics.
Each generation of offspring in a breeding program, designated F1, F2, etc.
In genetics, the identification of multiple specific alleles on a person's DNA to produce a unique identifier for that person.
See also: forensics ...
reproductively isolated systems of breeding populations having a similar morphology
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
...
- a plant widely grown for its industrial oil in the 1940's. In the 1960's breeding efforts led to the removal of two compounds, erucic acid and glucosinolates, changing the plant to an edible oilseed now called canola.
Species. A classification of related organisms that can freely interbreed.
Spore. A form taken by certain microbes that enables them to exist in a dormant stage. It is an asexual reproductive cell. See Asexual reproduction, Dormant.
Species: A group of organisms that differ from all other groups of organisms and that are capable of breeding and producing fertile offspring. This is the smallest unit of classification for plants and animals. Compare phylum.
The resulting mouse will be chimaeric but, if you are lucky (and if you've gotten this far, you obviously are), its germ cells will carry the deleted gene. A few rounds of careful breeding can then produce progeny in which both copies of the gene ...
 See also: Organ, Plant, Species, Animal, Human
|
