Data/hora: 09/06/2024 17:19:49

Provedor de dados: 	74	
País: 	Brazil	
Título: 	B-chromosomes in two Brazilian populations of Dendropsophus nanus (Anura, Hylidae)	
Autores: 	Medeiros,Lilian R.; Rossa-Feres,Denise C.; Jim,Jorge; Recco-Pimentel,Shirlei M.	
Data: 	2006-01-01	
Ano: 	2006	
Palavras-chave: 	Anura; B-chromosome cytogenetics Dendropsophus supernumerary chromosome.	
Resumo: 	We report on the presence of B-chromosomes in two populations of Dendropsophus nanus (= Hyla nana Boulenger, 1889) from São Paulo State, Brazil. Such chromosomes were observed in 4 out of 43 specimens (9.3%) and in 9 out of 15 specimens (60%) from the municipalities of Nova Aliança and Botucatu, respectively. The karyotype 2n = 30 + 1B found in D. nanus was similar to that of other species with 2n = 30 chromosomes, except for the presence of an additional small telocentric chromosome. In one specimen from Botucatu, cells with one to three extra chromosomes were observed. These B-chromosomes appeared as univalent in meiosis I and did not bear a nucleolar organizer region or exhibit constitutive heterochromatin.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200010	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572006000200010	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.29 n.2 2006	
Fonte: 	info:eu-repo/semantics/openAccess