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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]
Hindi literature (Hindi: हिंदी साहित्य, romanized: hindī sāhitya) includes literature in the various Central Indo-Aryan languages, also known as Hindi, some of which have different writing systems. Earliest forms of Hindi literature are attested in poetry of Apabhraṃśa such as Awadhi and Marwari.
There is some evidence of adaptive evolution in genes linked to brain development, but some of these genes are often associated with diseases, e.g. microcephaly (see Table 2). However, there is a particular interest in the search for adaptive evolution in brain genes, despite the ethical issues surrounding such research.
Thirdly, it is a phenotypic trait or adaptive trait, with a functional role in each individual organism, that is maintained and has evolved through natural selection. Historically, adaptation has been described from the time of the ancient Greek philosophers such as Empedocles and Aristotle .
Eukaryote hybrid genomes result from interspecific hybridization, where closely related species mate and produce offspring with admixed genomes.The advent of large-scale genomic sequencing has shown that hybridization is common, and that it may represent an important source of novel variation.
Adaptationism is an approach to studying the evolution of form and function. It attempts to frame the existence and persistence of traits, assuming that each of them arose independently and improved the reproductive success of the organism's ancestors.
It is the second stage in the history of hybridity, characterized by literature and theory that study the effects of mixture (hybridity) upon identity and culture. The principal theorists of hybridity are Homi Bhabha , Néstor García Canclini , Stuart Hall , Gayatri Spivak , and Paul Gilroy , whose works respond to the multi-cultural awareness ...
Hybrid zones can form from secondary contact. A hybrid zone exists where the ranges of two interbreeding species or diverged intraspecific lineages meet and cross-fertilize. . Hybrid zones can form in situ due to the evolution of a new lineage [1] [page needed] but generally they result from secondary contact of the parental forms after a period of geographic isolation, which allowed their ...