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DNA reduplication during meiotic prophase in the oocytes of Carausius morosus Br. (Insecta, Cheleutoptera) (1972)

Koch, P. ; Pijnacker, L. P. ; Kreke, J.

Springer

Chromosoma 36 (1972), S. 313-321

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ISSN: 1432-0886

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract Cytological investigations combined with cytophotometric DNA determinations on Feulgen stained squash preparations of ovarioles from third and fourth instar nymphs of Carausius morosus revealed that during meiotic prophase a largely despiralized stage follows pachytene and that in this stage an extra reduplication of the nuclear DNA takes place (“pachyreduplication phase”). Meiotic prophase then proceeds with “tetrapachytene”, a pachytene-like stage with twice the amount of DNA as compared to oocyte nuclei in earlier meiotic stages, and with more than half the somatic number of elements, being probably autobivalents.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00283250

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