Studies on the karyotype and gametogenesis in Trichuris muris
- 1 March 1994
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Helminthology
- Vol. 68 (1) , 67-72
- https://doi.org/10.1017/s0022149x0001350x
Abstract
The cytological study of males and females of Trichuris muris (Schrank, 1788) revealed the diploid number of chromosomes to be 2n=6. The sex determining mechanism was XX♀/XY♂. All the chromosomes were subtelocentric. Sex chromosomes formed the smallest pair, but X and Y were difficult to distinguish morphologically. Chromosome changes during gametogenesis in both sexes followed a classical pattern except in the male prophase and metaphase I. Four male autosomes formed two bivalents, each with one proximal chiasma with strict localization, while sex chromosomes X and Y formed two univalents. Female chromosomes formed three rod bivalents type, which possessed three, two and two chiasmata.Keywords
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