BioScience Dictionary

 
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Found Recombination 36 times.

Displaying results 1 to 10.

1. Balanced chromosome
A chromosome which is unable to pair with its homologue and participate in homologus recombination during meiosis because it contains several inversion mutations (that is, has segments which have become flip-flopped).

2. Biohazard
A risk of exposure to harmful bacteria , virus es, or other dangerous biological agents, particularly those found in genetic recombination studies or in clinical microbiology labs.

3. 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. In human beings, 1 centimorgan is equivalent, on average, to 1 million base pair s.

4. Chi sequence
A specific sequence of nucleotide s on a site on the genome of the bacteria Escherichia coli which strongly encourages recombination and crossing over to occur at that site.

5. Chi structure
The name for the X-shaped structure which forms during the recombination process between two plasmid s, or circular pieces, of DNA . The Greek letter chi resembles this structure.

6. Chimeric DNA
A molecule of DNA that has resulted from recombination , or has resulted from DNA from two sources being spliced together.

7. Chromosome mapping
The mapping of the relative locations of genes on a chromosome by analyzing linkage frequencies (how often different genes are inherited together) and crossover frequencies (how often different combinations of three or more genes are inherited) or recombination frequencies.

8. Copy choice (copy choice hypothesis)
A genetic recombination mechanism where the new DNA molecule comes about by replicating selected parts of each parental DNA molecule and by alternating between the two (maternal and paternal).

9. Crossing over
The breaking during meiosis of one maternal and one paternal chromosome , the exchange of corresponding sections of DNA , and the rejoining of the chromosomes. This process can result in an exchange of allele s between chromosomes. Compare recombination .

10. Cruciform structure
A structure, shaped like a cross, which can form during homologous recombination when inverted base-pair repeat s pair with each other on the same strand of DNA instead of with homologous sections on a different strand of DNA.