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. 1981;83(2):289-93.
doi: 10.1007/BF00286796.

Behaviour of the ZW sex bivalent in the snake Bothrops jararaca

M L Beçak, W Beçak

Behaviour of the ZW sex bivalent in the snake Bothrops jararaca

M L Beçak et al. Chromosoma. 1981.

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.

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References

    1. Experientia. 1962 Apr 15;18:173-4 - PubMed
    1. Experientia. 1972 Feb 15;28(2):228-9 - PubMed
    1. Chromosoma. 1969;26(2):188-200 - PubMed
    1. Chromosoma. 1972;38(2):185-236 - PubMed
    1. Chromosoma. 1965;17(1):1-10 - PubMed

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