Hereditary carrier
Organism with a recessive genetic allele that does not display the recessive trait / From Wikipedia, the free encyclopedia
A hereditary carrier (genetic carrier or just carrier), is a person or other organism that has inherited a recessive allele for a genetic trait or mutation but usually does not display that trait or show symptoms of the disease. Carriers are, however, able to pass the allele onto their offspring, who may then express the genetic trait.