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Across 4. Nuclear vision is about to occur because chromatin has condensed and the chromosomes are visible 7. Spindle disappears 8. The main microtubule organizing center of the cell, divides before mitosis begins 13. Centromeres of chromosomes are now in alignment on a single plane at the center of the cell 15. Preparations for sister chromatid separation of evident 16. Barrel shaped organelles 17. Used to produce human tissues 18. Protein complexes, develop on either side of the centromere during cell division

Down 1. Protein involved in organizing chromosomes 2. Contains only one chromosome of each kind 3. Production of a new individual 5. Newly formed plasma membrane that expands outward until it reaches the old plasma membrane and fuses with this membrane 6. Region where sister chromatids are constructed and attached to each other 9. Sister chromatids of each duplicated chromosome separate at the centromere, giving rise to two daughter chromosomes 10. Consists of dna and associated proteins 11. Indentation of the membrane between the two daughter nuclei 12. Imaginary plane that is perpendicular and passes through a circle 14. Includes two chromosomes of each kind