Biology. A dominant allele or character; an individual in which a particular dominant allele is expressed.

a characteristic inherited according to Mendelian laws.

= multiple allele n.

A lethal allele or chromosomal abnormality (see A. 1d).

Genetics. A gene or allele that produces a readily recognizable phenotype and is used as a reference esp. in genetic mapping; (later also) a…

any allele of a genetic locus known to have three or more alleles.

A mutant allele which is inactive and fails to produce a detectable product compared with the wild-type allele. Cf. amorphic, adj. 3.

any allele which is functionally less effective than the corresponding wild-type allele.

Genetics. A mutant allele that produces an effect qualitatively different from that of the wild-type allele.

an allele indistinguishable from another allele in its effect on the phenotype except when special techniques are employed.

any allele which is functionally more effective than the corresponding wild-type allele.