recombination
any process that generated new gene or chromosome combinations; meiosis generates recombinants through the independent assortment of chromosomes and crossing over ...
Recombination usually denotes a genetic event that occurs during the formation of sperm and egg cells (especially in areas of study of biology topics). It is also referred to as crossing over (or change of phase).
Recombination
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Recombination frequency
Total number of recombinants divided by the total number of progenies in a test cross.
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The repair of a DNA lesion through a process, similar to recombination, that uses recombination enzymes.
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Genetic Recombination in Bacteria
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Transformation
Conjugation
Transduction
Significance of genetic recombination in bacteria.
Reductionism ...
Homologous recombination is a type of genetic recombination that occurs during meiosis (the formation of egg and sperm cells).
recombination A way in which meiosis produces new combinations of genetic information.
recombination
The formation of new gene combinations; in eukaryotes, may be accomplished by new associations of chromosomes produced during sexual reproduction or crossing over; in prokaryotes, may be accomplished through transformation, ...
Recombination: The process by which progeny derive a combination of genes different from that of either parent.
Recombination The formation of a new combination of linked alleles by crossover at meiosis.
Recurrence risk The chance that a genetic disease may occur in siblings (or other relatives) of an affected child.
Recombination frequency. The frequency at which crossing over occurs between two chromosomal loci--the probability that two loci will become unlinked during meiosis.
Recombination
Recombinant DNA is produced when genetic information from more than one organism is recombined in a laboratory process into a hybrid molecule.
Source : PhRMA Genomics
Replication ...
Recombination synapse The initial stage in the recombination process in which four molecules of recombinase and their associated DNA molecules come together.
Genetic recombination
The process by which a fragment of DNA from one molecule (chromosome, plasmid, phage genome) is exchanged with or integrated into another molecule to produce a recombinant molecule(s).
cre-lox recombination DNA constructs that contain either the Cre recombinase gene or the lox target sites for the Cre protein. The lox sites are used to direct the site of recombination when the Cre protein is present.
Recombination
- The formation of new combinations of genes. Recombination occurs naturally in plants and animals during the production of sex cells (sperm, eggs, pollen) and their subsequent joining in fertilization.
recombination The formation of new combinations of alleles through exchange of sections of homologous chromosomes during the process of meiosis; sometimes refers to the combinations of new alleles that result from fertilization.
RECOMBINATION - See HOMOLOGOUS RECOMBINATION.
RECOMBINATION-REPAIR - A mode of filling a gap in one strand of duplex DNA by retrieving a homologous single strand from another duplex.
Recombination creates new combinations of alleles. Alleles that arose at different times and different places can be brought together. Recombination can occur not only between genes, but within genes as well.
To use recombination as a cloning system, it is important to be able to select against host vectors which do not contain the insert of interest. Two toxic genes were examined for this purpose.
Step 4 - recombination of alleles into each small square.
Step 5 - Determination of Genotype and Phenotype ratios in the next generation.
Step 6 - Labeling of generations, for example P1, F1, etc.
Homologous recombination
Substitution of a segment of DNA by another that is identical (homologous) or nearly so. Occurs naturally during meiotic recombination; also used in the laboratory for gene targeting to modify the sequence of a gene.
The lack of recombination means that the entire non-recombining portion of the Y is passed intact from father to son. A male shares the same Y chromosome with his father, paternal grandfather, paternal great-grandfather, and so on. (Fig. 2).
homologous recombination - process whereby stretch of DNA in a chromosome is replaced by a homologous (highly similar) DNA molecule for the purpose of altering the gene's function.
The percent of recombination (crossing over) can beused as a measure of how far apart genes are. 1% crossing over = 1 map unit.
Example
G = gray body ...
conjugation
A recombination mechanism that results in the transfer of genetic, material between two cells that are temporarily joined.
6.1 DNA: Homologous recombination.
Two double helices exchange homologous regions, usually so that a non-homologous region farther down can be inserted. This method can be used for insertion of viral DNA into a host cell's genome.
Distances are established by linkage analysis, which determines the frequency at which two gene loci become separated during chromosomal recombination. (See Mapping.) Genetic marker.
Gene map -- the linear arrangement of mutable sites on a chromosome as deduced from genetic recombination experiments.
Centimorgan (cM) A unit of measure of recombination frequency. One centimorgan is equal to a 1% chance that a marker at one genetic locus will be separated from a marker at a second locus due to crossing over in a single generation.
Both the reduction of the chromosome number from 2n to 1n and the recombination of genes is accomplished in an amazingly simple way.
RecombinationA natural cellular process through which DNA molecules of similar or identical sequence can be exchanged. This process is the molecular basis of crossing over during meiosis and some DNA repair mechanisms.
Antigenic shift is a sudden change in antigenicity caused by the recombination of the influenza genome, which can occur when a cell becomes simultaneously infected by two different strains of type A influenza.
ectopic recombination.
Related Terms:
Recombination
The process by which progeny derive a combination of linked genes different from that of either parent. In higher organisms, this can occur by crossing over between their loci during meiosis.
Crossing-over (recombination): The exchange of genetic material between non-sister chromatids of homologous chromosomes (i.e., between maternal and paternal chromosomes) during meiosis.
The entire genome of this species has been base sequenced and it is used to do research on the basic cellular mechanics of replication, recombination, cell division and metabolism.
Vaccine derived from recombination of rabies glycoprotein gene from ERA strain in the depleted thymidine-kinase region of the Copenhagen strain of vaccinia virus genome ...
The chromatids of each chromosome are no longer identical because of recombination. Meiosis II separates the chromatids producing two daughter cells each with 23 chromosomes (haploid), and each chromosome has only one chromatid.
This laborious method involves transfecting a crippled gene into cultured embryonic stem cells, searching through the thousands of resulting clones for one in which the crippled gene exactly replaced the normal one (by homologous recombination), ...
In genetic mapping studies an offspring having a non-parental allele combination. An individual or cell with a genotype produced by recombination.
Also known as: non-parental
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 See also: DNA, Chromosome, Organ, Gene, Sequence
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