The Evaluation of Forensic DNA Evidence (1996) / Chapter Skim
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Glossary
Glossary
Pages 214-218
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From page 214... ...
Band shift-the phenomenon in which DNA fragments in one lane of a gel migrate at a different rate from that of identical fragments in other lanes of the same gel. Base pair two complementary nucleotides in double-stranded DNA; these are AT or GC.
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Ceiling principle a procedure for setting a minimum profile frequency. One hundred persons from each of 15-20 genetically homogeneous populations spanning the range of racial groups in the United States are sampled.
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From page 216... ...
Inbreeding coefficient the probability that two homologous genes in an individual are descended from the same gene in an ancestor; a measure of the proportion by which the heterozygosity is reduced by inbreeding; designated by F Interim ceiling principle For each allele, the highest frequency (adjusted upward for statistical uncertainty)
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From page 217... ...
Polymerase chain reaction an in vitro process for making many copies of a fragment of DNA; abbreviated PCR. Polymorphism the presence of more than one allele at a locus in a population; in forensic loci, the most common allele usually has a frequency less than 0.6.
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From page 218... ...
Sex chromosomes- the X and Y chromosomes. Short tandem repeat a tandem repeat in which the repeat units are three, four, or five base pairs; abbreviated STR.
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