Science

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Across
  1. 2. a structure formed from condensed chromatin. Chromosomes consist of two identical chromatids attached at the centromere, giving them a characteristic “X” shape. Chromosomes occur in pairs. Human cells have 23 pairs of chromosomes, or 46 total chromosomes.
  2. 4. DNA strands in the nucleus during interphase. Chromatin stains dark, making it relatively easy to see. (The Greek root “chroma” means “color.”)
  3. 11. Jelly-like substances
  4. 14. Nuclear membrane develops around the two new nucleus. It’s the final phase of mitosis
  5. 16. the part of a chromosome where the chromatids are attached. During mitosis, spindle fibers attach to the chromosome at the centromere.
  6. 17. One of two identical halves of a replicated chromosome.
  7. 18. Chromosomes cut in half and separate to opposite poles. Now they’re called sister chromatids
  8. 20. A variable that doesn’t depend on the other
Down
  1. 1. Make an observation, make a hypothesis, draw conclusions
  2. 3. The cell spends most of its time in this phase. DNA is long strands
  3. 4. a cylindrical organelle in animal cells that is involved in cell division. Centrioles form spindle fibers which separate chromosomes during cell division.
  4. 5. Synthesizes the ribosomes
  5. 6. Where organisms combine oxygen and glucose to make energy. This all happens because of mitochondria
  6. 7. Making thoughts with limited information
  7. 8. The thing that stays the same for each trial (same ping pong ball, same surface, dropped from the from the same height each time)
  8. 9. Where the photosynthesis takes place
  9. 10. Chromatin condensed into chromosomes
  10. 12. the formation of two daughter cells from a single parent cell.
  11. 13. Chromosomes meet in the middle. The spindle fibers attach to the chromosomes. Specifically on the middle part called the centromere
  12. 15. Collects the proteins
  13. 16. the division of the cytoplasm of the cell to form two daughter cells.
  14. 19. the equal division of the chromosomes into two genetically identical daughter nuclei. Mitosis consists of four stages. During prophase, chromosomes form from condensed chromatin. During metaphase, the chromosomes line up along the center axis of the cell. During anaphase, the chromosomes split up and chromatids are pulled to opposite ends of the cell. During telophase, a new nuclear membrane forms around each set of chromatids.
  15. 21. a molecule that carries genetic information. _ _ _ stands for deoxyribonucleic acid.