dominant

dominant /dom·i·nant/ (dom´ĭ-nant)

1. exerting a ruling or controlling influence.

2. in genetics, capable of expression when carried by only one of a pair of homologous chromosomes.

3. a dominant allele or trait.

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dom·i·nant (dm-nnt)

adj.

1. Exercising the most influence or control.

2. Of, relating to, or being an allele that produces the same phenotypic effect whether inherited with a homozygous or heterozygous allele.

n.

1. A dominant allele or trait.

2. An organism having a dominant trait.

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dominant

[dom′inənt]

Etymology: L, dominari, to rule

1 exerting a ruling or controlling influence.

2 in genetics, capable of expression when carried by only one of a pair of homologous chromosomes.

3 in coronary artery anatomy, supplying the posterior diaphragmatic part of the interventricular septum and the diaphragmatic surface of the left ventricle; said of the right and left coronary arteries.

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dominant

1. exerting a ruling or controlling influence; in genetics, capable of expression when carried by only one of a pair of homologous chromosomes.

2. a dominant allele or trait. If a defect, appearance in all heterozygotes and homozygotes tends toward the trait being self-limiting because of culling or death. See also gene, dominance.

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dominant X-linked inheritance

see x-linked.

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dominant

Genetics A phenotype expressed when a particular gene is present in a cell, regardless of whether the allelic set contains 2 different forms of expression; the allele with the masked phenotype is termed recessive Dominant disorders Achondroplasia, familial hypercholesterolemia, Huntington's disease. See Filial generation, Homozygote, Trait. Cf Recessive.