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What does admixture mean in genetics?

Posted on August 25, 2022 by Author

What does admixture mean in genetics?

Genetic admixture occurs when individuals from two or more genetically distinguishable groups have children together. This might happen when individuals from one part of the world settle into a new geographic region already inhabited by other people, e.g. due to invasions or large-scale migrations.

What is an admixture study?

Abstract. Admixture mapping is a powerful method of gene mapping for diseases or traits that show differential risk by ancestry. Admixture mapping has been applied most often to African Americans who trace ancestry to Europeans and West Africans.

What is an admixture plot?

Admixture graphs are models of the demographic history of a set of individuals or populations. Genetic data, in particular f-statistics, are informative about the topology (the shape) and the parameters (drift and admixture weights) of a graph, which allows us to favor some models and to reject others.

What is admixture software?

ADMIXTURE is a software tool for maximum likelihood estimation of individual ancestries from multilocus SNP genotype datasets. It uses the same statistical model as STRUCTURE but calculates estimates much more rapidly using a fast numerical optimization algorithm.

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How do you use admixture?

To use ADMIXTURE, you need an input file and an idea of K, your belief of the number of ancestral populations. You should also have the associated support files alongside your main input file, in the same directory. For example, if your primary input file is a . bed file, you should have the associated .

What are admixtures examples?

There are two types of admixtures, viz., chemical admixtures and mineral admixtures. Accelerators, Retarders, Water-reducing agents, Super plasticizers, Air entraining agents etc. are the commonly used chemical admixtures. Fly-ash Blast-furnace slag, Silica fume and Rice husk Ash are the examples of mineral admixtures.

What is admixture in construction?

An admixture is a substance which can be added to concrete to achieve or modify its properties. Admixtures are added to the concrete, in addition to cement, water and aggregate, typically immediately before or during the mixing process.

What is the difference between mixture and admixture?

Mixture : its a composition of two or more substances, they can either be liquid, solid or gas. There is no chemical mixing of the substances, they are mixed physically only. Admixture : its the additional substance that is mixed in the standard proportioned combination of several other substances.

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What are admixtures give examples?

What is the purpose of plasticizer in concrete?

Plasticizer is used to increase workability in concrete. Due to plasticizer, we can reduce the water-cement ratio up to a certain limit. Basically, water-cement ratio is used for workability and hydration of cement.

What is admixture and its importance?

Admixtures are used in concrete to alter its properties in various ways. Some common uses include improving workability, increasing or decreasing cure time, and increasing concrete strength. Admixtures can also be used for aesthetic reasons, such as to change the color of the cement.

What are the uses of admixture?

Producers use admixtures primarily to reduce the cost of concrete construction; to modify the properties of hardened concrete; to ensure the quality of concrete during mixing, transporting, placing, and curing; and to overcome certain emergencies during concrete operations.

Can chromosome painting reveal human admixture history?

Hellenthal et al. (2014) describe a method, using a technique called chromosome painting, to follow the genetic traces of admixture back to the nearest extant population. The approach revealed details of worldwide human admixture history over the past 4000 years.

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Are there any genetic traces of Armenians in the world?

Based on these results Hellanthal et al. (2014) created a Genetic Atlas of human admixture history that shows genetic traces for various world populations. Regarding Armenians, it is interesting to see in what populations Armenians left their genetic traces (according to the study).

Is there a difference between Armenian admixture and ethnogenesis?

Most probably the Armenian admixture predates the scope of the study as the study only goes as far as 4000 years, while Armenian ethnogenesis is much older.

What is the genetic makeup of people in Turkey?

It is also interesting to note that the genetic makeup of people in Turkey mainly consists of Greek, Armenian and Iranian DNA, all of which show contributions around 10\%. In contrast the (Asiatic) Mongolian contribution only amounts to 3,7\%.

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