Centromere organization in meiotic chromosomes of Parascaris univalens.
The chromosomes of Parascaris univalens possess a continuous centromeric structure spanning their entire length in gonial cells. A cytological and ultrastructural analysis of P. univalens meiotic chromosomes was performed. The results show that during meiosis the holocentric germline chromosomes of male P. univalens undergo restriction of kinetic activity to the heterochromatic terminal regions. These regions lack kinetochore structures and interact directly with spindle microtubules.
Goday
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C
Centro de Investigaciones Biológicas (CSIC), Madrid, Spain.
Pimpinelli
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S
D000818:Animals; D002503:Centromere / Q000648:ultrastructure*; D002871:Chromosome Banding; D002875:Chromosomes / Q000648:ultrastructure*; D004247:DNA / Q000302:isolation & purification / Q000648:ultrastructure*; D005455:Fluorescent Antibody Technique; D008297:Male; D008540:Meiosis; D008856:Microscopy, Fluorescence; D009348:Nematoda / Q000235:genetics* / Q000648:ultrastructure; D009693:Nucleic Acid Hybridization
D004247:DNA