Similar phenotypes caused by mutations in more than one gene.

The production of the same or similar phenotypes (observed biochemical, physiological, and morphological characteristics of a person determined by his/her genotype) by different genetic mechanisms. There are two types: (1) allelic heterogeneity -- when different alleles at a locus can produce variable expression of a condition; and (2) locus heterogeneity -- the term used to describe disease in which mutations at different loci can produce the same disease phenotype.

Manifestation of similar or the same observable characteristics or traits (i.e., phenotype) resulting from different genetic mechanisms, such as changes (mutations) of different genes or a combination of genes.

Process by which a phenotype can be caused by different loci. A complex example is epilepsy, which may be attributable to different causes in different individuals: single gene disorders, multifactorial inheritance, chromosomal disorders, or even brain injuries. The last case is a phenocopy.

The phenomenon that a disorder can be caused by different allelic or non-allelic mutations.

Refers to diseases, conditions or other characteristics that appear similar but whose genetic basis is different in different populations or individuals

(1) The presence of different alleles at a gene locus. See Allelic diversity. (2) The ability of more than one allele to cause the same trait, for instance, a disease. Alleles at different gene loci (locus heterogeneity), as well as those at the same locus (allelic diversity), may each be expressed as the same trait.

Mutations in different genes produce a clinically similar picture

Similar phenotypes produced by different genetic mechanisms.

when different genes produce identical phenotypes (e.g., bleeding disorders)