Meiotic behavior of the X1X2Y1Y2 quadrivalent of the primate Alouatta caraya.
Chromosome Res
; 4(5): 350-6, 1996 Aug.
Article
em En
| MEDLINE
| ID: mdl-8871823
A multiple sex chromosome system was found in three unrelated individuals of the primate Alouatta caraya. This mechanism is originated by a translocation between the Y chromosome and one of the autosomes (A7). Mitotic karyotypes show two small, acrocentric chromosomes (AY and YA), which are the translocation products. In metaphase I of male meiosis, there is a very long chain quadrivalent in which the order of the element is: X-YA-A7-AY. Segregation in the quadrivalent is alternate and gives balanced products. Synaptonemal complex karyotypes at pachytene show the structure of the quadrivalent made by the four axes. There is a slight difference in the relative length of AY and YA and the kinetochore of A7 aligns with that of AY. The synaptic pattern and changes in the quadrivalent during pachytene are described. Thin sections of the quadrivalent body show that the chromatin packing in the sex chromosome region is different from that of the autosomal region. This X1X2Y1Y2/X1X1XX2 sex chromosome system may be extended among other members of the genus Alouatta.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromossomo X
/
Cromossomo Y
/
Alouatta
/
Meiose
Limite:
Animals
Idioma:
En
Revista:
Chromosome Res
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda