recombination


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recombination

 [re″kom-bĭ-na´shun]
1. the reunion, in the same or different arrangement, of formerly united elements that have been separated.
2. in genetics, the process that creates new combinations of genes by shuffling the linear order of the DNA, such as occurs naturally by crossing over of homologous chromosomes during meiosis or of homologous DNA sequences in somatic cells during mitosis, or occurs in vitro when DNA or RNA is manipulated for genetic engineering.
bacterial recombination in bacterial genetics, the process of producing a new gene by any of several processes, e.g., the sexual union of two parents, molecular crossing over between two DNA chains, or transformation.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

re·com·bi·na·tion

(rē-kom'bi-nā'shŭn),
1. The process of reuniting parts that had become separated.
See also: recombinant.
2. The reversal of coupling phase in meiosis as gauged by the resulting phenotype.
See also: recombinant.
3. The formation of new combinations of genes.
Farlex Partner Medical Dictionary © Farlex 2012

recombination

(rē′kŏm-bə-nā′shən)
n.
The natural or artificial rearrangement of genetic material in living organisms or viruses, especially the creation in offspring of sexually reproducing parents of new combinations of genes through the process of crossing over during meiosis.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

re·com·bi·na·tion

(rē-kom'bi-nā'shŭn)
1. The process of reuniting of parts that had become separated.
2. The reversal of coupling phase in meiosis as gauged by the resulting phenotype.
See also: recombinant
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

recombination

The formation in offspring of a combination of two or more genes that differs from the arrangement of these genes in either parent. This is the result of the exchange of segments of DNA during the germ cell divisions that resulted in the formation of paternal sperms and maternal ova.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Recombinationclick for a larger image
Fig. 266 Recombination . The rearrangement of genes during meiosis.

recombination

  1. a rearrangement of genes during MEIOSIS so that a GAMETE contains a haploid GENOTYPE with a new gene combination. Recombination can occur by INDEPENDENT ASSORTMENT of genes on different chromosomes, but the term is used normally to refer to genes linked on the same chromosome where recombination is achieved by CROSSING OVER. See Fig. 266 .
  2. any exchange between DNA molecules or integration of one DNA molecule into another.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
It is possible to observe the difference in particle size from ZnO (figure 4a) to [Nb.sub.2][O.sub.5] (Figure 4b), this difference proves the possible formation of an energy barrier decreasing charge recombination [7, 9, 10].
set to acquire a majority of 21st Century FOX, the recombination of Viacom and CBS has resurfaced in a big way with Redstone, Reuters notes.
Figure 2(a) shows the components of the recombination current when the junction is forward biased and Figure 2(b), the corresponding energy band diagram.
Having accounted for the influence of recombination on the phylogeny ofL.
These pleiotrophic effects include deregulation of type 1 site-specific recombination. It has been indicated recently that H-NS protein binds to upstream position of fimA promoter and accelerates its activity in ON orientation switch.14,15 The binding region of H-NS protein located immediately downstream of fimE, encompasses site I binding of IHF and extending into the switch region.
Photoluminescence (PL) is a common method to analyze the characteristics of photogenerated charge trapping and carrier separation behavior, and the PL emissions result from the recombination of photogenerated charge carriers.
Physiological DSBs in V(D)J Recombination. The role of physiological DSBs in the diversification of the adaptive immune response is well documented.
Identification of CIAV Genomic Recombination. To detect recombinant patterns, parental strains, and potential putative recombination breakpoints in CIAV variants in this study, the recombination detection program 4 (RDP 4) was applied [25] using nine methods (RDP, GENECONV, BootScan, MaxChi, Chimaera, SiScan, Phyl- Pro, LARD, and 3Seq) with general settings (window size = 20, highest multiple-comparison-corrected P value = 0.01, Bonferroni correction, finding consensus daughter sequences, and polishing breakpoints).
The 24 articles in this volume discuss various aspects of recombinational DNA repair, meiotic recombination, and the regulation of these processes.
Focusing on a protein called ATR, a master regulator of DNA repair and recombination, the investigators verified that the protein also plays a crucial role in regulating the ALT pathway.

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