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"Stages in the division of a grandmother cell of microspores or pollen grains of a lily, somewhat diagrammatic. 11, reduction division, the double chromosomes separating and at the same time showing longitudinal division, with the longitudinal halves widely apart at their equatorial ends." -Stevens, 1916

Division of Grandmother Cell Stage 11

"Stages in the division of a grandmother cell of microspores or pollen grains of a lily, somewhat diagrammatic.…