in classical genetics, an individual who carries one deleterious allele for an autosomal recessive disorder. in clinical discussions, may refer to an individual who carries a deleterious allele that predisposes to disease.
a defender
a usurper
the successor
a backer
a mediator
the successor to the throne―the heir apparent
a sympathizer―(事業などに対してなら)―a well-wisher
the living
a briber
a prisoner
a suicide
the truster
the proposer
the compiler
a backer
the producer