Behaviour of the ZW sex bivalent in the snake Bothrops jararaca |
| |
Authors: | Maria Luiza Beçak Willy Beçak |
| |
Affiliation: | (1) Serviço de Genética, Institute Butantan, São Paulo, Brasil |
| |
Abstract: | The behavior of the ZW sex bivalent was investigated in female meiosis of the poisonous snake Bothrops jararaca. The Z is euchromatic and synapses end to end with the W. The W chromosome shows a heterochromatic segment distally in the short arm. Pairing occurs between the long arm of the W and the slightly longer arm of the mediocentric Z. A sex vesicle, similar to the one found in the XY placental mammals, does not occur in snakes. The Z and W chromosomes segregate reductionally in the first meiotic division and equationally in the second.This work is dedicated to the memory of my father Lino Pires de Camargo |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|