Recombination

recombination
any process that generated new gene or chromosome combinations; meiosis generates recombinants through the independent assortment of chromosomes and crossing over ...
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Recombination frequency
Total number of recombinants divided by the total number of progenies in a test cross.
Related ...
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Recombination frequencies can also be measured for autosomal genes. The strategies for their calculation are more complex than for sex chromosomes.
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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).
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The repair of a DNA lesion through a process, similar to recombination, that uses recombination enzymes.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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Recombination results in a new arrangement of maternal and paternal alleles on the same chromosome. Although the same genes appear in the same order, the alleles are different.
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Genetic Recombination in Bacteria
Index to this page
Transformation
Conjugation
Transduction
Significance of genetic recombination in bacteria.
Reductionism ...
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The exchange of pieces of DNA during the formation of eggs and sperm. Recombination allows the chromosomes to shuffle their genetic material, increasing the potential of genetic diversity. Homologous recombination is also known as crossing over.
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Recombination within the yeast host strain has been postulated to contribute to the mechanism of chimerism.
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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.
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recombination A way in which meiosis produces new combinations of genetic information.
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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, conjugation, ...
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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.
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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.
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Recombination
Each chromosome in our sperm or egg cells is a mixture of genes from our mother and our father. Recombination can be thought of as gene shuffling.
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Recombination frequency. The frequency at which crossing over occurs between two chromosomal loci--the probability that two loci will become unlinked during meiosis.
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Recombination: The process by which DNA is exchanged between pairs of equivalent chromosomes (crossing over) during egg and sperm formation. Recombination has the effect of making the chromosomes of the offspring distinct from those of the parents.
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recombination
): The exchange of genetic material between non-sister chromatids of homologous chromosomes (i.e., between maternal and paternal chromosomes) during meiosis.
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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).
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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.
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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).
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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 ...
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conjugation
A recombination mechanism that results in the transfer of genetic, material between two cells that are temporarily joined.
Covered in Lab 6 Unicellular and Filamentous Organization ...
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Distances are established by linkage analysis, which determines the frequency at which two gene loci become separated during chromosomal recombination. (See Mapping.) Genetic marker.
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Gene map -- the linear arrangement of mutable sites on a chromosome as deduced from genetic recombination experiments. Gene therapy -- addition of a functional gene or group of genes to a cell by gene insertion to correct an hereditary disease.
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site-specific recombination A type of genetic recombination that occurs only at specific sequences. small nuclear RNA (snRNA) Any of several small RNA molecules in the nucleus.
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Recombination 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.
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Furthermore, mutations may have little phenotypic effect in isolation but create new traits when combined in an organism through genetic recombination.
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A set of closely linked genetic markers present on one chromosome which tend to be inherited together (not easily separable by recombination). Some haplotypes may be in linkage disequilibrium.
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