Studies on the karyotype and gametogenesis in Trichuris muris.
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 female/XY male. 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 of normal type, which possessed three, two and two chiasmata.
Spakulová
M
M
Parasitological Institute, SAS, Kosice, Slovak Republic.
Králová
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I
Cutillas
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C
D000818:Animals; D004171:Diploidy; D005260:Female; D005718:Gametogenesis; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D008677:Metaphase; D051379:Mice; D008813:Mice, Inbred ICR; D008938:Mitosis; D012730:Sex Chromosomes; D013047:Specific Pathogen-Free Organisms; D014258:Trichuris / Q000235:genetics* / Q000502:physiology*