
(from the article `heredity`) ...some individuals who inherit a dominant, disease-causing gene show only partial symptoms of the disease; some in fact may show no expression of ...
Found on
http://www.britannica.com/eb/a-z/n/49

The state in which a genetic trait, although present in the appropriate genotype (i.e., homozygous, hemizygous, or heterozygous according to the state of dominance and mode of inheritance), fails to manifest itself in the phenotype because of nongenetic mechanisms. ... Compare: hypostasis. ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: non-pen′ĕ-trants Definitions: 1. The state in which a genetic trait, although present in the appropriate genotype (homozygous, hemizygous, or heterozygous according to the state of dominance and mode of inheritance), fails to manifest itself in the phenotype because of modifying factors.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=60987
No exact match found.