منابع مشابه
The founder effect and deleterious genes.
During the rapid growth of a population from a few founders, a single deleterious gene in a founder can attain an appreciable frequency in later generations. A computer simulation, which has the population double itself in early generations, indicates a lethal could attain a frequency of 0.1. Since deleterious recessive genes are eliminated from large populations at a very slow rate, variations...
متن کاملA comparison of verbal person marking across Tupian languages Uma comparação da marcação verbal de pessoa nas línguas Tupí
this paper explores the diachrony of the verbal person marking system across the large and structurally diverse tupian language family. i argue that the historical development of these different patterns are best informed by analyzing their synchronic distributions with regard to the current evolutionary hypotheses on the family. i apply a parsimony reconstruction model across the topology of t...
متن کاملThe effective founder effect in a spatially expanding population.
The gradual loss of diversity and the establishment of clines in allele frequencies associated with range expansions are patterns observed in many species, including humans. These patterns can result from a series of founder events occurring as populations colonize previously unoccupied areas. We develop a model of an expanding population and, using a branching process approximation, show that ...
متن کاملFounder effect in spinal and bulbar muscular atrophy (SBMA).
We analyzed the polymorphic (CAG)n and (GGC)n repeats of the androgen receptor gene in 113 unrelated X-linked spinal and bulbar muscular atrophy (SBMA) X chromosomes and 173 control X chromosomes in Japanese males. The control chromosomes had an average CAG repeat number of 21 +/- 3 with a range from 14-32 repeat units, and SBMA chromosomes had a range from 40-55 with a median of 47 +/- 3 copie...
متن کاملFounder-effect speciation theory: failure of experimental corroboration.
The theory of founder-effect speciation proposes that colonization by very few individuals of an empty habitat favors rapid genetic changes and the evolution of a new species. We report here the results obtained in a 10-year-long and large-scale experiment with Drosophila pseudoobscura designed to test the theory. In our experimental protocol, populations are established with variable numbers o...
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ژورنال
عنوان ژورنال: Revista Diadorim
سال: 2020
ISSN: 2675-1216,1980-2552
DOI: 10.35520/diadorim.2020.v22n3a38007