Admixture
Admixture may refer to: * Genetic admixture, the result of interbreeding between two or more previously isolated populations within a species * Racial admixture, admixture between humans, also referred to as miscegenation * Hybrid * Mixture, the chemical substance which results when two different materials are combined without occurrence of chemical reactions * Admixture (concrete) Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wi ...

Miscegenation
Miscegenation ( ) is the interbreeding of people who are considered to be members of different races. The word, now usually considered pejorative, is derived from a combination of the Latin terms ''miscere'' ("to mix") and ''genus'' ("race") from the Hellenic γένος. The word first appeared in '' Miscegenation: The Theory of the Blending of the Races, Applied to the American White Man and Negro'', a pretended anti-abolitionist pamphlet David Goodman Croly and others published anonymously in advance of the 1864 U.S. presidential election. The term came to be associated with laws that banned interracial marriage and sex, which were known as anti-miscegenation laws. Opposition to miscegenation, framed as preserving so-called racial purity, is a typical theme of racial supremacist movements. Although the notion that racial mixing is undesirable has arisen at different points in history, it gained particular prominence among white communities in United States during the coloni ...
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Genetic Admixture
Genetic admixture occurs when previously diverged or isolated genetic lineages mix.⅝ Admixture results in the introduction of new genetic lineages into a population. Examples Climatic cycles facilitate genetic admixture in cold periods and genetic diversification in warm periods. Natural flooding can cause genetic admixture within populations of migrating fish species. Genetic admixture may have an important role for the success of populations that colonise a new area and interbreed with individuals of native populations. Mapping Admixture mapping is a method of gene mapping that uses a population of mixed ancestry (an admixed population) to find the genetic loci that contribute to differences in diseases or other phenotypes found between the different ancestral populations. The method is best applied to populations with recent admixture from two populations that were previously genetically isolated. The method attempts to correlate the degree of ancestry near a genetic locus w ...
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Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ...
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Mixture
In chemistry, a mixture is a material made up of two or more different chemical substances which are not chemically bonded. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of Solution (chemistry), solutions, Suspension (chemistry), suspensions and colloids. Mixtures are one product of mechanically blending or mixing chemical substances such as chemical element, elements and Compound (chemistry), compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup. Despite the fact that there are no chemical changes to its constituents, the physical properties of a mixture, such as its melting point, may differ from those of the components. Some mixtures can be separation process, separated into their components by using physical (mechanical or thermal) means. Azeotropes are one kind of mixture that usually poses considerable diffi ...
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