(jen′ŏ-tīp″)

[geno- + type]
ABBR: GT
1. The total of the hereditary information present in an organism.
2. The pair of genes present for a particular characteristic or protein.
3. A type species of a genus.
SEE: phenotype

APOE genotype

A genetic variant with some use in the diagnosis of Alzheimer disease and other dementias.

CCR5 delta 32 genotype

A mutation that confers a survival advantage and substantial resistance to the human immunodeficiency virus (HIV). Homozygosity for this allele protects adults from HIV-1 after blood and body fluid exposure. Heterozygosity may confer some protection against disease progression.

IL28B genotype

A nucleotide polymorphism in some patients infected with hepatitis C virus that is associated with a favorable response to therapy with interferon-based treatment regimens.