Heteromorphic sex chromosomes in Eupsophus insularis (Amphibia: Anura: Leptodactylidae).
Chromosome Res
; 4(6): 467-70, 1996 Sep.
Article
em En
| MEDLINE
| ID: mdl-8889246
The chromosomes of the Chilean frog Eupsophus insularis are described for the first time. This species has a chromosome number of 2n = 30, and based on the karyotype it is concluded that E. insularis is closely related to E. migueli. E. insularis has an XX/XY system of sex determination, and pericentromeric constitutive heterochromatin is present in all chromosomes except in the Y chromosome. It is postulated that the Y chromosome is derived from a small ancestral metacentric chromosome that lost its heterochromatic segment.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Anuros
/
Cromossomos Sexuais
Limite:
Animals
País/Região como assunto:
America do sul
/
Chile
Idioma:
En
Revista:
Chromosome Res
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Chile
País de publicação:
Holanda