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Horizontal gene transfer (HGT) refers to the transfer of genes between distant branches on the tree of life. In evolution , it can scramble the information needed to reconstruct the phylogeny of organisms , how they are related to one another.
Introgression is an important source of genetic variation in natural populations and may contribute to adaptation and even adaptive radiation. [7] It can occur across hybrid zones due to chance, selection or hybrid zone movement. [8]
Tree of life showing vertical and horizontal gene transfers. Horizontal gene transfer (HGT) or lateral gene transfer (LGT) [1] [2] [3] is the movement of genetic material between organisms other than by the ("vertical") transmission of DNA from parent to offspring (reproduction). [4] HGT is an important factor in the evolution of many organisms.
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The level of gene flow among populations can be estimated by observing the dispersal of individuals and recording their reproductive success. [4] [11] This direct method is only suitable for some types of organisms, more often indirect methods are used that infer gene flow by comparing allele frequencies among population samples.
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Quizlet was founded in 2005 by Andrew Sutherland as a studying tool to aid in memorization for his French class, which he claimed to have "aced". [6] [7] [8] ...