Centromere organization in meiotic chromosomes of Parascaris univalens |
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Authors: | C Goday S Pimpinelli |
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Institution: | (1) Centro de Investigaciones Biológicas (CSIC), Velázquez 144, E-28006 Madrid, Spain;(2) Istituto di Genetica, Università Degli Studi, Via G. Amendola 165/A, I-70126 Bari, Italy |
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Abstract: | 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. |
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