"Most people with the dominant mutant polydactyly allele have extra digits, but at least 25% have the normal number of digits. What is the genetic explanation for this observation?"

Incomplete penetrance

Explanation:

Many individuals with those of the following disease that mentioned in the scenario have included extra amount, however the specific number of figures seems to be at least 25 percent. Then, the following biological explanation is required for such an observation that seems to be the incomplete penetrance.

Gene interactions take place if the couple or another of the not different genotype allelic or nonallelic genes affects the output of the specific phenotypic characters.

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