Patterns of replication in the neo-sex chromosomes of Drosophila nasuta albomicans.
J Biosci
;
2000 Sep; 25(3): 229-34
Artigo
em Inglês
| IMSEAR
| ID: sea-111303
ABSTRACT
Drosophila nasuta albomicans (with 2n = 6), contains a pair of metacentric neo-sex chromosomes. Phylogenetically these are products of centric fusion between ancestral sex (X, Y) chromosomes and an autosome (chromosome 3). The polytene chromosome complement of males with a neo-X- and neo-Y-chromosomes has revealed asynchrony in replication between the two arms of the neo-sex chromosomes. The arm which represents the ancestral X-chromosome is faster replicating than the arm which represents ancestral autosome. The latter arm of the neo-sex chromosome is synchronous with other autosomes of the complement. We conclude that one arm of the neo-X/Y is still mimicking the features of an autosome while the other arm has the features of a classical X/Y-chromosome. This X-autosome translocation differs from the other evolutionary X-autosome translocations known in certain species of Drosophila.
Texto completo:
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Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Filogenia
/
Glândulas Salivares
/
Cromossomos Sexuais
/
Translocação Genética
/
Cromossomos
/
Evolução Molecular
/
Replicação do DNA
/
Drosophila
/
Larva
/
Animais
Idioma:
Inglês
Revista:
J Biosci
Ano de publicação:
2000
Tipo de documento:
Artigo
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