Answer:
variable expressivity
Explanation:
Variable expressivity is a phenomenon in genetics that quantifies the extent to which a particular genotype of an individual is being expressed phenotypically. This might be as a result of combination of genetic and environmental factors.
Variable expressivity is observed in people with polydactyly. The expression of people with this condition varies, as some persons possess extra fingers or toes that are fully functional, while others possess only a small tag of extra skin. Polydactylous people who have this same genetic condition expresses the condition phenotypically, differently.
