Chromosome Inversions
Mostrando 13-24 de 217 artigos, teses e dissertações.
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13. Chromosome evolution: Karyotype variability in Platyrrhini and studies of sinteny and homologies between human chromosomes / Evolução cromossômica: estudo da variabilidade cariotípica em Platyrrhini e das homeologias e sintenias com cromossomos humanos
We studied the karyotypes of Brazilian monkeys (Platyrrhini, Primates) using both traditional cytogenetic techniques as well as FISH. FISH analysis employed human probes for chromosome 14, 15 and the X chromosome and a probe of the Y chromosome of Brachyteles arachnoides obtained by chromosome microdissection. Twenty-four individuals of Alouatta guariba clam
Publicado em: 2008
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14. High levels of chromosomal differentiation in Euchroma gigantea L. 1735 (Coleoptera, Buprestidae)
Euchroma gigantea was karyotypically studied using conventional staining, C-banding, silver nitrate staining and ribosomal fluorescent in situ hybridization (rDNA FISH). Broad wide autosomal polymorphism and a complex sex determination system were found in this beetle. Karyotype complements ranging from 2n = 32, X1X2X3Y1Y2Y3 to 2n = 36,X1X2X3Y1Y2Y3 were dete
Genetics and Molecular Biology. Publicado em: 2008
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15. Molecular systematics and wing morphometric variation in species of the Drosophila tripunctata radiation / Sistematica molecular e variação morfometrica da asa de especies de Drosophila da radiação tripunctata
The tripunctata group is the second largest Neotropical group of Drosophila in number of species and was included in the tripunctata radiation which comprises other closely related groups. The second chromosome of Drosophila mediopunctata (a species that belongs to the tripunctata group) is highly polymorphic for inversions. Previous work suggested the pr
Publicado em: 2007
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16. Polytene chromosomes and phylogenetic relationships in ten Drosophila species of the annulimana group (Diptera, Drosophilidae)
Polytene chromosomes banding patterns of ten of the 16 species of the Neotropical annulimana group of Drosophila were used to propose phylogenetic relationships among species. Drosophila annulimana chromosomes were used as the standard sequence and the most parsimonious series of changes (paracentric inversions) were considered. In some cases, intermediate h
Genetics and Molecular Biology. Publicado em: 2007
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17. Karyological geographic variation of Oligoryzomys nigripes Olfers, 1818 (Rodentia, Cricetidae) from Brazil
The karyotypes of 85 specimens of Oligoryzomys nigripes (Rodentia, Sigmodontinae) collected in the Cerrado and Atlantic Forest of seven states of Brazil were analyzed. Eighty four specimens presented a karyotype with 2n = 62 and one individual had 2n = 61 due to a monosomy of the X chromosome. High levels of intra- and inter-population karyotypic variability
Genetics and Molecular Biology. Publicado em: 2007
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18. Cytogenetics investigation on orofacial cleft individuals and screening of informative cases for further studies / Investigação citogenetica em individuos com fendas orofaciais e triagem dos casos informativos para estudos especificos
Cleft lip with or without cleft palate (CL/P) occurs in approximately 1/500 to 1/1000 newborns and cleft palate (CP), etiologically distinct, in approximately 0,4/1000 newborns. They have a complex etiology, and the great majority of clefts appear to be isolated anomalies, in which have been observed a very important genetic component. However, in a signific
Publicado em: 2007
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19. Citogenética molecular comparativa do DNAr 18S e 5S em piranhas (Serrasalminae, Characidae) Amazônia Central
Basic and molecular cytogenetic studies have been performed in 11 species of the subfamily Serrasalminae: Colossoma macropomum, Serrasalmus (S. altispinnis, S. elongatus, S. gouldingi, S. rhombeus, S. cf rhombeus, S. serrulatus and S. maculatus), Pygocentrus nattereri, Pristobrycon striolatus and Catoprion mento, collected along different sites in Central Am
Publicado em: 2007
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20. Pigmentation in Drosophila mediopunctata: phenotypic and heritability / Pigmentação em Drosophila mediopunctata : plasticidade fenotipica e herdabilidade
Drosophila mediopunctata é uma espécie pertencente ao grupo tripunctata, que tem como traço marcante um padrão de pigmentação abdominal, sob a forma de três pintas na região mediana dos últimos tergitos. Nesta espécie, este padrão é variável, havendo indivíduos com quatro fenótipos, que vão de zero a três pintas. Já se observou que esta var
Publicado em: 2007
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21. Caracterização cromossômica de espécies de acarás da subfamília Cichlasomatinae (Perciformes: Cichlidae) da Amazônia Central
Cytogenetic studies were performed on 13 species of acarás in the family Cichlidae, subfamily Cichlasomatinae, collected from different locations in the Amazon basin. Of these, two exhibited 2n=50, one 2n=42, two 2n=46, and eight 2n=48 chromosomes. Different karyotypic formulae were found in this subfamily, with the number of arms varying from 50 to 60. Thi
Publicado em: 2006
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22. Estimating the effects of population size and type on the accuracy of genetic maps
Based on simulation studies, it was shown that the type and size of experimental populations can exert an influence on the accuracy of genetic maps. A hypothetical genome map (one chromosome with nine equidistant molecular markers) was generated for the following population types: F2 with dominant and co-dominant markers, backcrossing, recombinant inbred lin
Genetics and Molecular Biology. Publicado em: 2006
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23. Variação morfologica em populações brasileiras de Drosophila melanogaster : variação latitudinal e temporal, herdabilidade e associação com inversões cromossomicas / Morphological variation in Brazilian populations of Drosophila melanogaster: latitudinal and temporal variation, heritability and association with chromossomal inversions
O presente trabalho tem como objetivo caracterizar a variação do tamanho e forma das asas de populações de Drosophila melanogaster em três pontos ao longo de uma grande amplitude latitudinal na costa brasileira. O trabalho foi feito a partir de coletas realizadas no Recife, Rio de Janeiro e Porto Alegre, e os seguintes aspectos foram abordados: 1) varia
Publicado em: 2006
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24. Chromosomal banding patterns in the eyelid-less microteiid lizard radiation: The X1X1X2X2:X1X2Y sex chromosome system in Calyptommatus and the karyotypes of Psilophthalmus and Tretioscincus (Squamata, Gymnophthalmidae)
Cytogenetic studies were performed on five closely related microteiid lizards (Gymnophthalmini), three Calyptommatus species and Psilophthalmus paeminosus from the sand dunes of the middle São Francisco river in the semiarid caatinga of the Brazilian state of Bahia and Tretioscincus oriximinensis from the Brazilian Amazon region. The diploid chromosome numb
Genetics and Molecular Biology. Publicado em: 2005-12