misexpression
/ˌmɪsɪkˈsprɛʃn/ /ˌmɪsɛkˈsprɛʃn/noun
Genetics. The process or result of altering a gene so as to change its associated character in a phenotype; the incorrect expression of a gene in a phenotype.
Origin
Mid 17th century (in an earlier sense). From mis- + expression.