Exposición del Dr. Prebisch, Director Principal a cargo de la Secretaría Ejecutiva de la Comisión, en la primera sesión de trabajo el 14 de febrero 1962; versión provisional

Documento Informativo, No 7. Publicado separadamente en cada idioma

Exposición del Dr. Raúl Prebisch, Director Principal a cargo de la Secretaría Ejecutiva

También en: Prebisch, Raúl: Discursos, declaraciones y documentos 1952-1963, Tomo II

Meiotic pairing of B chromosomes, multiple sexual system, and Robertsonian fusion in the red brocket deer Mazama americana (Mammalia, Cervidae)

Deer species of the genus Mazama show significant inter and intraspecific chromosomal variation due to the occurrence of rearrangements and B chromosomes. Given that carriers of aneuploidies and structural rearrangements often show anomalous chromosome pairings, we here performed a synaptonemal complex analysis to study chromosome pairing behavior in a red brocket deer (Mazama americana) individual that is heterozygous for a Robertsonian translocation, is a B chromosome carrier, and has a multiple sex chromosome system (XY1Y2). The synaptonemal complex in spermatocytes showed normal chromosome pairings for all chromosomes, including the autosomal and sex trivalents. The electromicrographs showed homology among B chromosomes since they formed bivalents, but they also appeared as univalents, indicating their anomalous behavior and non-Mendelian segregation. Thus, synaptonemal complex analysis is a useful tool to evaluate the role of B chromosomes and rearrangements during meiosis on the intraspecific chromosomal variation that is observed in the majority of Mazama species. © FUNPEC-RP.

El plan de acción de Sao Paulo: una exposición sobre la técnica de planificación adoptada

Incluye Bibliografía

A vocação construtiva na Arte Sul-Americana: os cinéticos venezuelanos e os concretos paulistas

Pós-graduação em Artes - IA

Desafios internacionais à política agrícola norte-americana: o contencioso do algodão entre Brasil e Estados Unidos e o CAFTA-DR

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Diversidade de ácaros em indivíduos masculinos e femininos de Triplaris americana L. (Polygonaceae) e eficiência de seu pólen como alimento para Euseius citrifolius Denmark & Muma (Acari: Phytoseiidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)