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Tuatara: Volume 12, Issue 2, July 1964

Fig. 2: Electron micrograph of a nucleolus (right of centre) from a spermatocyte of Pachyrhamma fasscifer × 24,000. Part of the nuclear membrance can be seen at lower left. (Kindly supplied by W. S. Betaud, D.S.I.R., Lower Hutt). — Fig. 3: Two nucleoli from a pollen mother-cell of Allium triquetrum. Notice the nucleolus organising chromosomes (two, closely synapsed) between the two nucleoli. The two nucleoli had been drawn together through the pairing of the homologous organising chromosomes to…

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Fig. 2: Electron micrograph of a nucleolus (right of centre) from a spermatocyte of Pachyrhamma fasscifer × 24,000. Part of the nuclear membrance can be seen at lower left. (Kindly supplied by W. S. Betaud, D.S.I.R., Lower Hutt). Fig. 3: Two nucleoli from a pollen mother-cell of Allium triquetrum. Notice the nucleolus organising chromosomes (two, closely synapsed) between the two nucleoli. The two nucleoli had been drawn together through the pairing of the homologous organising chromosomes to which the nucleoli were attached.

Fig. 2: Electron micrograph of a nucleolus (right of centre) from a spermatocyte of Pachyrhamma fasscifer × 24,000. Part of the nuclear membrance can be seen at lower left. (Kindly supplied by W. S. Betaud, D.S.I.R., Lower Hutt).
Fig. 3: Two nucleoli from a pollen mother-cell of Allium triquetrum. Notice the nucleolus organising chromosomes (two, closely synapsed) between the two nucleoli. The two nucleoli had been drawn together through the pairing of the homologous organising chromosomes to which the nucleoli were attached.

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