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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. 3. The formation of new combinations of genes.
- genetic r. 1. the presence in progeny of combinations of genotypes and perhaps phenotypes, not present in either parent, resulting from crossing-over; 2. in microbial genetics, the inclusion of a chromosomal part or extrachromosomal element of one microbial strain in the chromosome of another; the interchange of chromosomal parts or genes between different microbial strains.
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re·com·bi·na·tion .rē-.käm-bə-'nā-shən n the formation by the processes of crossing-over and independent assortment of new combinations of genes in progeny that did not occur in the parents
re·com·bi·na·tion·al -shnəl, -shən-əl adj
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re·com·bi·na·tion (re″kom-bĭ-naґshən) 1. the reunion, in the same or a different arrangement, of formerly united elements which have become 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.Medical dictionary. 2011.