Expressivity

The different nature (degree of disability) of the already manifested hereditary trait in the carrier, corresponding to the given genotype.

Expressivity depends on many factors:


 * other genes,
 * environmental influence

In carriers of the same dominant allele, we find a spectrum of morphological deviations (example: polydactyly - from skin folds to multiple functional fingers).

It describes the degree of expression of the given genotype in the phenotype.

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 * Penetration