a process by which genetic information is rearranged during meiosis. This process also occurs during the somatic rearrangements of DNA which occur in the formation of genes which encode antibody molecules.
The formation in offspring of combinations of genes not present in either parent. This results from the assortment of chromosomes and their genes during the production of gametes and the subsequent union of different sorts of gametes at fertilization.
The formation of a new combination of alleles through meiotic crossing over. Some authors include intrachromosomal gene conversion under this heading. As this has been shown on the Y chromosome, they prefer not to refer to it as 'non-recombining'.
The formation of a new genotype by chromosome re-assortment or intrachomosomal crossing over.
the formation of new gene combinations not originally found in the cell.
A new combination of alleles resulting from the rearrangement occuring by crossing-over or by independent assortment (see crossing over).
the formation of new combinations of genes as a result of crossing over (exchange of genes) between structurally similar chromosomes, resulting in progeny with different gene combinations than in the parents.
Process by which genetic elements in two separate genomes are brought together in one unit.
The process in which strands of DNA are cut open and rejoined. This is done by a complex of proteins called DNA recombinase.
Process in which chromosomes or DNA molecules are broken and the fragments are rejoined in new combinations. Can occur in the living cell - for example, through crossing-over during meiosis - or in the test tube using purified DNA and enzymes that break and ligate DNA strands.
The natural process in reproduction of breaking and rejoining DNA strands to produce new combinations of genes and, thus generate genetic variation. Recombination is a coarse-grained process, like shuffling a deck of sticky cards, and each chromosome is only "shuffled" by cutting the cards once or a few times during the formation of eggs or sperm.
In genetics, the formation of new combinations of genes as a result of crossing over between chromosomes. This happens routinely during the process of meiosis.
The situation arising following a crossover event, in which new combinations of alleles are found in cis.
The creation of new DNA sequences by splicing together fragments of DNA from two or more sources. Recombination occurs naturally during the formation of gametes, when chromosomes from each of an organism's parents trade segments of DNA. In genetic engineering, recombination is used to introduce genes to an organism.
Reciprocal exchange of DNA between two members of a chromosome pair that occurs during meiosis. Also called crossing-over.
a process of "mixing and matching" of paired chromosomes that takes place at cell division. One or more segments may be swapped between the two chromosomes, or occasionally a segment may replace the corresponding segment on the other chromosome. This process can also occur on palindromic segments of the chromosome and may affect paired loci, such as DYS 385a and DYS385b.
Physical exchange of portions of a homologous pair of chromosomes. Recombination occurs during meiosis when homologous chromosomes are aligned in close proximity. It usually produces recombinant chromosomes that contain a complete complement of genes, but with a novel recombination of the alleles of genes that is different from either of the parental chromosomes. Recombination creates genetic diversity by making new combinations of existing alleles. The frequency of recombination between two loci is what is measured in a genetic mapping experiment.
(genetics) a combining of genes or characters different from what they were in the parents
The exchange of a segment of DNA between two chromosomes of the same pair during meiosis, leading to a novel combination of genetic material in the egg or sperm
Part of the process of cell division, in which chromosomes pair up and exchange genetic material. The result is different combinations of genes in the offspring.
A 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. Another form of recombination, site-specific recombination, is found where transfer, rearrangement or insertion of specific sections of DNA occurs e.g. insertion of viral DNA into chromosomes, gene switching etc.
There are several connotations: (1) The shuffling of genetic material between an individual's two chromosome pairs that occurs just prior to the production of ova or sperm (the crossing-over phase of meiosis); and (2) the production of a new individual through the union of a sperm and an ovum from two parents at fertilization.
Process by which genetic material of a cell is exchanged and thus reorganized, for example between two viruses which both infect the same cell. Has important implications for "dating" the AIDS pandemic: because HIV-1 is highly prone to recombination, many researchers doubt that phylogenetic dating is a meaningful technique to apply to this virus.
formation by the process of crossing over an independent assortment of new genes in the offspring that did not occur in the parents.
The reshuffling of the genes in a fertilized egg as a result of crossing-over and re-assortment of the chromosomes during meiosis (ie, during the formation of the sperm and egg).Mitochondrial DNA does not recombine.
(synonym: crossing over) The exchange of a segment of DNA between two homologous chromosomes during meiosis leading to a novel combination of genetic material in the gamete
A process leading to the formation of new combinations of genes, e.g. at meiosis.
The formation of new combinations of alleles or new genes which occur when two homologous DNA or chromosomes break and exchange parts.
A phenomenon, also known as crossing over, where genetic material is physically exchanged by paired chromosomes, usually during the formation of sperm and egg cells (meiosis).
the rearrangement, especially by crossing over in chromosomes, of nucleic acid molecules forming a new sequence of the constituent nucleotides
The joining of genes, sets of genes, or parts of genes, into new combinations.
The rearrangement of DNA by breaking and re-ligations of the DNA strands; also called crossovers.
the rearrangement, for example by crossing over, of nucleic acid molecules to produce new sequences
Every person has two copies of each chromosome (with the exception of the sex chromosomes): one member of each pair is inherited from the father and the other from the mother. The members of a pair of chromosomes (known as homologous chromosomes or homologues) contain corresponding sets of genes, but each pair of genes (alleles) may not be identical. During the formation of sex cells (egg and sperm), homologous chromosomes exchange segments, shuffling the combinations of alleles on each one. This is called recombination. Subsequently, the reshuffled homologues separate from each other and only one member of each pair ends up in a given sperm or egg cell. This process ensures that sexual reproduction passes on a mixture of alleles from all the parental chromosomes
the reciprocal exchange of portions of two homologous chromosomes (usually equivalent) during gamete formation.
The rearrangement of genes that occurs when reproductive cells (gametes) are formed. Recomination results in offspring that have a combination of characteristics different from that of their parents.
An event occurring during meiosis - the formation of sperm and egg cells. One chromosome from the mother and the other from the father break and trade segments with one another.
The process by which offspring derive a combination of genes different from that of either parent i.e. new allelic combinations have been generated. This can occur by crossing-over in higher organisms.
The natural exchange of alleles at two heterozygous loci as homologous chromosomes divide into two groups during the process in which they become gametes.
A way in which meiosis produces new combinations of genetic information. During synapsis, chromatids may exchange parts with other chromatids, leading to a physical exchange of chromosome parts; thus, genes from both parents may be combined on the same chromosome, creating a new combination.
The process of crossing over, which occurs during meiosis I. It involves breakage in the same position of each of a pair of non-sister chromatids from homologous chromosomes, followed by joining of non-sister fragments, resulting in a reciprocal exchange of DNA between non-sister chromatids within an homologous pair of chromosomes. recombination fraction; recombination frequency The proportion of gametes that have arisen from recombination between two loci. It is estimated as the number of recombinant individuals among a set of offspring of a particular mating, divided by the total number of offspring from that mating. Represented by the Greek letter theta (). Linkage maps are created from estimates of recombination fraction between all pair-wise combinations of loci. See map distance.
The formation of a new combination of genes on a chromosome as a result of crossing over.
Genetic exchange resulting from a cross-over between two different DNA molecules or different regions of a DNA molecule. See General recombination, Illegitimate recombination and Site specific recombination.
process in an organism in which two DNA molecules give rise to daughter DNA that combines segments from the two parent molecules. It may involve the integration of one DNA molecule into another (addition), the su bstitution of a DNA segment for a homologous segment in other DNA, or the exchange of homologous segments between two DNA molecules.
Process of recombining DNA molecules in a new order. Recombination happens in cells during meiosis. Under lab conditions, it may be carried out by enzymatic cleaving of purified DNA and interlinking it with a second enzymatic cleaved DNA molecule.
the occurrence of progeny with combinations of genes other than those that occurred in the parents, due to independent assortment or crossing over
Genetic exchange among chromosomes, producing new combinations of genes.
The process by which progeny derive a combination of genes different from that of either parent. In higher organisms, this can occur by crossing over.
The process by which two homologous chromosomes exchange genetic material during the formation of eggs and sperm.
(1) In general, any process in a diploid or partly diploid cell that generates new gene or chromosomal combinations not found in that cell or in its progenitors. (2) At meiosis, the process that generates a haploid product of meiosis whose genotype is different from either of the two haploid genotypes that constituted the meiotic diploid.
The formation of new combinations of genes not found in the parents due to crossing over between homologous chromosomes during meiosis.
The exchange of regions of DNA on chromosomes via cross over during meiosis (see crossover).
Any process which gives rise to cells or individuals (called recombinants) that associate in new ways two or more genes by which their parents differed.
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
Any process in which chromosomes or DNA molecules are cleaved and the fragments are rejoined to give new combinations. Occurs naturally in cells as the result of the exchange (crossing over) of DNA sequences on maternal and paternal chromatids during meiosis; also is carried out in vitro with purified DNA and enzymes.
