- The genetic constitution of an organism or cell; also refers to the specific set of alleles inherited at a locus
Definition from: GeneReviews
from the University of Washington and the National Center for Biotechnology Information
- A genotype is an individual's collection of genes. The term also can refer to the two alleles inherited for a particular gene. The genotype is expressed when the information encoded in the genes' DNA is used to make protein and RNA molecules. The expression of the genotype contributes to the individual's observable traits, called the phenotype.
Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute
Related discussion in the Handbook
See also Understanding Medical Terminology.