Behaviour of the ZW sex bivalent in the snake Bothrops jararaca

descriptionPublicationkeyboard_double_arrow_right Article 01 Jul 1981 English Publisher:Springer Science and Business Media LLCJournal:Chromosoma, volume 83, pages 289-293 (issn: 0009-5915, eissn: 1432-0886,

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Authors: M L, Beçak; W, Beçak;

doi: 10.1007/bf00286796

pmid: 7273949

Behaviour of the ZW sex bivalent in the snake Bothrops jararaca

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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.

Related Organizations

Instituto Butantan
Brazil

Keywords

Male, Meiosis, Sex Chromosomes, Karyotyping, Oocytes, Animals, Mitosis, Female, Snakes

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