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This document summarizes recent cytological research on apogamy in ferns. Key findings include: 1) Some ferns develop sporophytes without meiosis, retaining the 2x chromosome number. This is associated with apospory where sporangia develop without meiosis. 2) In some varieties, the sporophyte chromosome number is close to the gametophyte number, suggesting it retains the reduced x number. 3) In some varieties, nuclei migrate between prothallial cells and fuse before sporophyte development, analogous to
- Author
- ramongonza
- Language
- EN