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Across 3. process by which a cell divides into two new daughter cells 7. mass of rapidly dividing cells that can damage surrounding tissue 8. part of eukaryotic cell divisions during which the cell nucleus divides 9. phase of mitosis in which the chromosomes separate and move to opposite ends of the cells 10. disorder in which some of the body’s cells lose their ability to control growth 13. series of events in which a cell grows, and prepares for division and divides to form two daughter cells 16. structure of an animal cell that helps to organize cell division 17. type of reproduction in which cells from the parents unite to form the first cell of a new organism 18. one of the two identical “sister” parts of a duplicated chromosome 19. threadlike structure of DNA and protein that contains genetic information; in eukaryotes, chromosomes found in the nucleus, in prokaryotes, they are found in the cytoplasm

Down 1. process of reproduction involving a single parent that results in offspring that are genetically identical to the parent 2. period of the cell cycle between cell divisions 3. substance found in eukaryotic chromosomes that consists of DNA tightly coiled around histones 4. first and longest phase of mitosis in which the genetic material inside the nucleus condenses and the chromosomes become visible 5. phase of mitosis in which the distinct individual chromosomes begin to spread out into a tangle of chromatin 6. phase of mitosis in which the chromosomes line up across the center of the cell 11. process of programmed cell death 12. one of a group of external regulatory proteins that stimulate the growth and division of cells 14. division of the cytoplasm to form two separate daughter cells 15. region of the chromosome where the two sister chromatids attach