alternative form of a gene, e.g. dominant (always expressed if present) or recessive (only expressed if no dominant allele is present).

an increase in the number of copies of a specific DNA fragment.

two complementary nucleotide bases joined together by chemical bonds. The two strands of the DNA molecule are held together in the shape of a double helix by the bonds between base pairs. The base ade [..]

the science of informatics as applied to biological research. Informatics is the management and analysis of data using advanced computing techniques. Bioinformatics is particularly important as an adj [..]

observable change (not necessarily pathological) in the function of an organism, related to a specific exposure or event.

A gene that has been implicated in causing or contributing to the development of a particular disease.

Caenorhabditis elegans, a nemotode or roundworm, the first animal to have its genome completely sequenced and all the genes fully characterised.

The DNA in a cell is divided into structures called chromosomes. Chromosomes are large enough to be seen under a microscope. In humans, all cells other than germ cells usually contain 46 chromosomes: [..]

A term which is applied to genes, cells, or entire organisms which are derived from - and are genetically identical to - a single common ancestor gene, cell, or organism, respectively. Cloning of gene [..]

the process of producing a genetically identical copy (clone).