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  • Allele - An alternate form of a gene: for example, a gene for human hair color may have alleles that cause red or brown hair.
  • Chromosome - A cell structure that contains genetic information along strange of DNA.
  • DNA Fingerprint - The pattern of DNA fragments obtained by examining a person's unique sequence of DNA base pairs.
  • Electrophoresis - A method of separating molecules, such as DNA, according to their size and electrical charge using an electric current passes through a gel containing the samples.
  • Gene - A segment of DNA in a chromosome that contains information used to produce a protein, RNA molecule. It is a segment of DNA that codes for a particular physical trait.
  • PCR - Polymerase chain reaction. This is a method used to rapidly make multiple copies of a specific segment of DNA.
  • STR - Short tandem repeat. Repeats of a short DNA sequence (3-5 bases) that are in tandem (next to one another) with varying numbers of repeats found among individuals.
  • VNTR - Variable number of tandem repeats. Repeats of a long DNA sequence (5 or more) that are in tandem with varying numbers of repeats found among individuals.