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Across 1. these cells have the full number of chromosomes; word means "double" or 2 6. after DNA is copied it is made up of identical sister _______________. 13. a method of repair or replacement of cells; planarians reproduce this way 14. one of the five nucleotide bases; always joins with cytosine 17. the correct term for DNA being copied from top to bottom 18. another name for cell division; binary ________________. 20. the building blocks of DNA; made of a sugar, base, and phosphate 22. the molecule that makes up chromosomes and carries the genetic code 24. phase where chromosomes are dragged to opposite ends of cell by spindle 25. a cell surrounded by a protective covering 27. these cells have half the number of chromosomes; word means "half" 28. found on chromosomes, sections of DNA; carries codes for characteristics 29. the process by which DNA is copied and separated into new cells

Down 2. the acid that forms chromosomes 3. yeasts reproduce this way; uneven division of cytoplasm 4. the nuclear membrane disappears and DNA is copied; first phase of mitosis 5. the division of the parent cell's cytoplasm after mitosis is finished 7. the last stage of mitosis where the nuclear membrane is restored 8. type of reproduction that creates "clones" and no genetic variety; one parent 9. the organelle that forms spindle fibers 10. it takes three nitrogen bases to make one; smallest amount of information 11. chromosomes before they are curled up; very long; invisible in microscope 12. type of reproduction that allows for genetic variety; requires two parents 15. one of the five nucleotide baes; always joins with thymine 16. the protein fibers that pull sister chromatids apart; made by centriole 19. mitotic phase where sister chromatids are lined up in the middle of the cell 21. the nucleotide base found only in RNA that replaces thymine 23. the process where cells divide twice to reduce chromosomes by half 26. small segments copied from DNA that codes for proteins; single stranded