Y Chromosome Polymorphisms
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. Reconstruction of major maternal and paternal lineages of the Cape Muslim population
The earliest Cape Muslims were brought to the Cape (Cape Town -South Africa) from Africa and Asia from 1652 to 1834. They were part of an involuntary migration of slaves, political prisoners and convicts, and they contributed to the ethnic diversity of the present Cape Muslim population of South Africa. The history of the Cape Muslims has been well documente
Genet. Mol. Biol.. Publicado em: 19/04/2013
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2. Y-chromosome biallelic polymorphisms and native american population structure
It has been proposed that women had a higher migration rate than men throughout human evolutionary history. However, in a recent study of South American natives using mtDNA restriction fragment polymorphisms and Y-chromosome microsatellites we failed to detect a significant difference in estimates of migration rates between the sexes. As the high mutation ra
Publicado em: 2011
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3. Uniparental (mtDNA, Y-chromosome) polymorphisms in French Guiana and two related populations : implications for the region's colonization
Blood samples collected in four Amerindian French Guiana populations (Palikur, Emerillon, Wayampi and Kali’na) in the early 1980s were screened for selected mtDNA and Y-chromosome length polymorphisms, and sequenced for the mtDNA hypervariable segment I (HVS-I). In addition, two other Amerindian populations (Apala´ı and Matsiguenga) were examined for the
Publicado em: 2011
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4. Ribeiro's typology, genomes, and Spanish colonialism, as viewed from Gran Canaria and Colombia
Four biallelic and six multiallelic Y-chromosome polymorphisms were investigated in 59 Gran Canarian, 60 North African Berber and 46 Spanish subjects. These new data were merged with equivalent literature information to obtain the parental Y-chrosomomal contribution in Gran Canarians, Colombians, and Venezuelans. The results were then compared, for Gran Cana
Publicado em: 2010
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5. Genetic signatures of parental contribution in black and white populations in Brazil
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the
Publicado em: 2010
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6. DNA tests probe the genomic ancestry of Brazilians
We review studies from our laboratories using different molecular tools to characterize the ancestry of Brazilians in reference to their Amerindian, European and African roots. Initially we used uniparental DNA markers to investigate the contribution of distinct Y chromosome and mitochondrial DNA lineages to present-day populations. High levels of genetic ad
Brazilian Journal of Medical and Biological Research. Publicado em: 11/09/2009
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7. Genetic signatures of parental contribution in black and white populations in Brazil
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the
Genetics and Molecular Biology. Publicado em: 10/01/2009
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8. Estudos de citogenética e de filogenia molecular em roedores da tribo Akodontini / Cytogenetics and molecular phylogenetics in rodents of the tribe Akodontini
Traditionally comparative cytogenetic studies are based mainly on banding patterns. Nevertheless, when dealing with species with highly rearranged genomes, as in Akodon species, or with other highly divergent species, cytogenetic comparisons of banding patterns prove to be inadequate. Hence, comparative chromosome painting has become the method of choice for
Publicado em: 2009
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9. Chromosome evolution in tiger beetles: Karyotypes and localization of 18S rDNA loci in Neotropical Megacephalini (Coleoptera, Cicindelidae)
Four Neotropical tiger beetle species, three from the genus Megacephala and one from the genus Oxycheila, currently assigned to the tribe Megacephalini were examined cytogenetically. All three Megacephala species showed simple sex chromosome systems of the X0/XX type but different numbers of autosomal pairs (15 in M. cruciata, 14 in M. sobrina and 12 in M. r
Genetics and Molecular Biology. Publicado em: 2005-12
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10. Ribeiro's typology, genomes, and Spanish colonialism, as viewed from Gran Canaria and Colombia
Four biallelic and six multiallelic Y-chromosome polymorphisms were investigated in 59 Gran Canarian, 60 North African Berber and 46 Spanish subjects. These new data were merged with equivalent literature information to obtain the parental Y-chrosomomal contribution in Gran Canarians, Colombians, and Venezuelans. The results were then compared, for Gran Cana
Genetics and Molecular Biology. Publicado em: 2004
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11. Diversidade genética e desempenho forense da análise de haplótipos de locos microssatélites no cromossomo Y em populações brasileiras.
DNA polymorphisms on the human Y chromosome have increasingly been used for evolutionary studies and individual identification. Y chromosome STRs show moderate levels of polymorphism and typically spiky allele frequency distributions when compared to autossomal STRs. The patrilineal inheritance of the non recombining portion of the Y chromosome results in th
Publicado em: 2002
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12. Influencia de polimorfismos em genes de citocinas na morbidade da doença periodontal inflamatoria cronica
Chronic Periodontal Disease (CPD) is characterized by an inflammation in the supporting tissues of the teeth. It is primarily caused by bacteria present on tooth surfaces (biofilm), which adjacent to the gingiva, stimulate host cells to produce immunoinflammatory response. Cytokines represent important pathological mediators, which influence the onset and pr
Publicado em: 2002