Directional selection

Directional selection

A type of natural selection that removes individuals from one end of a phenotypic distribution and thus causes a shift in the distribution. The frequency of an allele is changed in a constant direction, either toward or away from fixation for that allele. Directional selection occurs when individuals at one phenotypic extreme have an advantage over individuals with more common phenotypes.

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Part of Speech: noun
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Industry/Domain: Natural environment
Category: Coral reefs
Organization: NOAA
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directional selection

Natural environment; Coral reefs

A type of natural selection that removes individuals from one end of a phenotypic distribution and thus causes a shift in the distribution. The frequency of an allele is changed ...

directional selection

Archaeology; Evolution

Selection causing a consistent directional change in the form of a population through time (e.g., selection for larger body size).

directional selection

Biology; Cell biology

A process of natural selection that tends to favor phenotypes at one extreme of the phenotypic range.

directional selection

Biology; Marine biology

Preferential change in a population, favoring the increase in frequency of one allele over another.

directional selection

Anthropology; Physical anthropology

Selection for or against one extreme of a trait. In the case of polygenic traits that are expressed as a continuum of phenotypes, such as human stature, it would be selection for ...

directional selection

Biology; General

A process of natural selection that tends to favor phenotypes at one extreme of the phenotypic range.

nodulose

Natural environment; Coral reefs

With small nodules, knobs or swellings.

fissure

Natural environment; Coral reefs

A deep and narrow depression cutting across the reef front with origins relating to jointing planes in the reef limestone or non-limestone bedrock.

damselfish

Natural environment; Coral reefs

A large family (Pomacentridae) of bony fishes which are abundant and common inhabitants of coral reefs. They possess robust, deep, and laterally compressed bodies. The majority of ...

complementary resources

Natural environment; Coral reefs

A pair of resources for which consumption by the consumer of one resource reduces its requirement for the other.

antennule

Natural environment; Coral reefs

A small antenna, especially the first pair of antennae in crustaceans.

odontophore

Natural environment; Coral reefs

A tooth-bearing structure found in most mollusks, except bivalves. It consists of several muscles and a cartilage which support the radula and radula sac; the term is also applied ...

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Industry/Domain: Animals Category: Rodents

Squirrel

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