ALLELOMORPH
allele, allelomorph
(noun) (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character; “some alleles are dominant over others”
Source: WordNet® 3.1
Etymology
Noun
allelomorph (plural allelomorphs)
(genetics, obsolete) synonym of allele
Source: Wiktionary
Al*le"lo*morph, n. [Gr. of one another + Gr. form.] (Biol.)
Definition: One of the pure unit characters commonly existing singly or in
pairs in the germ cells of Mendelian hybrids, and exhibited in
varying proportion among the organisms themselves. Allelomorphs which
under certain circumstances are themselves compound are called
hypallelomorphs. See Mendel's law. -- Al*le`lo*mor"phic (#), a.
As we know that the several unit characters are of such a nature that
any one of them is capable of independently displacing or being
displaced by one or more alternative characters taken singly, we may
recognize this fact by naming such characters allelomorphs.
Bateson.
Source: Webster’s Unabridged Dictionary 1913 Edition