allelomorph

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An allele.

Century Dictionary and Cyclopedia

1. n. In biology, one of a pair of mutually exclusive qualities exhibited respectively by each of two pure races or varieties of a species, these qualities being of such a nature that one or the other of the pair is exhibited in perfection, to the complete exclusion of the other, by each cross-bred descendant of the two pure races. When the cross-bred offspring, or the descendants of the crossbred offspring, of two pure races or varieties which differ from each other in respect So some characteristic are like one or the other parent in respect to this characteristic, and not intermediate between them, the characteristic in question, in each parental form, is termed by Bateson an allelomorph, or in both parental forms, considered collectively, a pair of allelomorphs. Thus, for example, when descendants are reared from a tall (D) and a short (R) variety of the garden-pea, some are tall and some short, but intermediate forms are as rare as they are in the tall and short varieties of pure blood when bred true. In this case tallness and shortness may be considered as a pair of mutually antagonistic or incompatible unit characters, or allelomorphs, each of which may replace but not combine with the other in the descendants from a cross between them. According to Mendel and those who accept his theoretical explanation of the results of his experiments, the cross-bred individuals have two sorts of germ-cells in approximately equal numbers, those which are like the germ-cells of one pure parental race (D) and those which are like the germ-cells of the other (R). If descendants are born from cross-breeds through the union of two of the D or tall germ-cells, the shortness (R) of the short variety will not be represented in the fertilized eggs from which they arise, and they will be tall and will have none but tall descendants; while those which arise from fertilized eggs formed by the union of the R or short germ-cells will be short and will have none but short descendants. Those which arise from fertilized eggs formed by the union of a tall (D) and a short (R) germ-cell may be tall or short but not intermediate.

Wiktionary

1. n. genetics one of a number of alternative forms of the same gene occupying a given position on a chromosome

GNU Webster's 1913

1. n. (Biol.) 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; same as allele, 2. Allelomorphs which under certain circumstances are themselves compound are called hypallelomorphs. See mendel's law.

WordNet 3.0

1. n. (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