Immature cleistothecia of Aspergillus nidulans (mutant bi, del) were serial-sectioned and studied by electron microscopy. Synaptonemal complexes or other conspicuous signs of chromosomal pairing were not observed in this material. This deviation from most other eukaryotes may be of significance for explaining the likewise unusual absence of crossover interference in this organism, as well as in Schizosaccharomyces pombe. In addition, we report on division spindles and spore formation in A. nidulans.
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EGEL-MITANI et al. (2008) studied this question.
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