The consistency of a genetic disease. For example, Marfan disease shows variable expressivity. Some persons with Marfan's merely have long fingers and toes while others have the full-blown disease with dislocation of the lens and dissecting aneurysm of the aorta.
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In clinical genetics, the degree of severity in which a gene is manifested.

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ex·pres·siv·i·ty .ek-.spres-'iv-ət-ē n, pl -ties the relative capacity of a gene to affect the phenotype of the organism of which it is a part compare PENETRANCE

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ex·pres·siv·i·ty (ek″sprĕ-sivґĭ-te) in genetics, the level of phenotypic expression of an inherited trait in an individual.

Medical dictionary. 2011.

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  • Expressivity — is a term used in genetics that refers to variations of a phenotype in individuals carrying a particular genotype. The term can be used to qualitatively or quantitatively characterize the extent of the phenotype variation given a particular… …   Wikipedia

  • expressivity — expressivity. См. экспрессивность. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • expressivity — [eks΄pres siv′ə tē] n. 1. the quality of being expressive 2. Genetics the relative degree to which a trait caused by a gene is manifested in an individual …   English World dictionary

  • expressivity — Degree of expression of a trait controlled by a particular gene. The gene may show different degrees of expression in different individuals. See: variable expressivity …   Glossary of Biotechnology

  • expressivity — expressive ► ADJECTIVE 1) effectively conveying thought or feeling. 2) (expressive of) conveying (a quality or idea). DERIVATIVES expressively adverb expressiveness noun expressivity noun …   English terms dictionary

  • expressivity — ˌekˌspreˈsivəd.ē, vətē, i noun ( es) Etymology: International Scientific Vocabulary expressive + ity; originally formed as German expressivität 1. : the relative capacity of a gene to modify the organism of which it is a part compare penetrance …   Useful english dictionary

  • expressivity — noun (plural ties) Date: 1934 1. the relative capacity of a gene to affect the phenotype of the organism of which it is a part 2. the quality of being expressive …   New Collegiate Dictionary

  • expressivity — /ek spre siv i tee/, n. 1. the quality or state of being expressive. 2. Genetics. the degree to which a particular gene produces its effect in an organism. Cf. penetrance. [1930 35; < G Expressivität. See EXPRESSIVE, ITY] * * * …   Universalium

  • expressivity — noun a) the quality of being expressive b) the degree to which a gene affects an organism …   Wiktionary

  • expressivity — (Roget s Thesaurus II) noun Vivid, effective, or persuasive communication in speech or artistic performance: articulacy, articulateness, eloquence, eloquentness, expression, expressiveness, facundity. See WORDS …   English dictionary for students

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