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- L
- Leucine.
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- LRT (see likelihood ratio test)
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- lagging strand
- The DNA strand synthesized in a discontinuous fashion, 5' to 3' away from the replication fork.
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- leading strand
- The DNA strand synthesized in a continuous fashion, 5' to 3' toward the replication fork.
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- length abridgment
- The gradual shortening of pseudogenes during evolution that is caused by an excess of deletions over insertions.
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- lethal mutation
- A mutation that causes either death or sterility of its homozygous carriers.
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- ligation
- The formation of a phosphodiester bond to link two adjacent bases separated by a nick in double-stranded DNA. Used to link sticky ends produced by restriction-endonuclease digestion. The process is catalyzed by the enzyme ligase.
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- likelihood ratio test
- A statistical test for goodness-of-fit.
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- LINE (Acronym of Long INterspersed Element)
- An interspersed repetitive sequence typically longer than 5,000 base pairs found in 10' or more copies in the genomes of multicellular eukaryotes.
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- linkage
- A condition in which two or more nonallelic genes reside in close proximity to each other and tend to be inherited together.
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- linkage disequilibrium
- Non-random, non-Mendelian association among polymorphic sites or alleles among loci.
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- localized repeated sequences
- Tandemly arrayed, repetitive sequences, usually made up of short simple repeated motifs (e.g., satellite DNA)
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- locus (plural loci)
- The site on a chromosome where a particular gene or DNA segment is located.
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- lowly repetitive genes
- Genes appearing in only a few copies in the haploid genome.
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