SYNAPTONEMAL COMPLEX-ANALYSIS OF THE SEX BIVALENT IN GOATS
Carregando...
Arquivos
Data
1994-01-01
Autores
Amaral, MEJ
Jorge, W.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Synaptonemal complex (SC) analysis of XY pairing in the goat (Capra hircus; 2n = 60) was investigated by electron microscopy for the first time in this species. Synapsis of the X and Y chromosomes begins during the mid-late zygotene stage as the autosomes complete their pairing. Only a small portion of the total length of the Y is paired with the X chromosome at this time. By the early pachytene, almost 90% of the Y is paired with the X. All the observed stages of the sex bivalent pairing showed the structural difference between the differential and pairing regions. In the pairing region, a synaptonemal complex is formed, while in the differential region the chromosome axes remain free.
Descrição
Palavras-chave
SYNAPTONEMAL COMPLEX, MEIOSIS, PACHYTENE, XY BIVALENT, GOAT
Como citar
Genetics Selection Evolution. Paris Cedex 15: Editions Scientifiques Elsevier, v. 26, n. 4, p. 369-375, 1994.