cell division, mitosis, and meiosis

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Across
  1. 3. the DNA and its proteins in eukaryotic cells
  2. 4. the two identical copies of DNA that make up a chromosome during mitosis
  3. 5. reproductive cells formed by Meiosis; Sperm and Egg; contain the organisms haploid number of chromosomes (n)
  4. 6. the division of a cell's nucleus that produces two new cells with identical DNA; for GROWTH and REPAIR; Prophase, Metaphase, Anaphase, Telophase
  5. 7. nuclear membrane of cell dissolves and chromosomes coil up and become visible; spindle fibers form
  6. 8. two new nuclei form and nuclear envelope surrounds them; chromosomes uncoil; spindles dissolve
  7. 9. the point on a chromosome where the two sister chromatids are attached
  8. 12. sister chromatids pull apart and move to opposite ends of the cell; chromatids now become chromosomes
  9. 15. 90% of the life of a cell; cell carries out its normal functions; divided into 3 phases: (G1) First Growth, (S) Synthesis, (G2) Second Growth
  10. 17. Final stage of the cell cycle; cytoplasm divides and creates two identical cells
  11. 18. cell that contains one set of chromosomes (Half the diploid #); gametes like sperm and egg are the only haploid cells as a result of meiotic division
Down
  1. 1. nuclear division that produces 4 daughter cells with half the number (haploid) of chromosomes; produces sperm and egg that will determine the traits of offspring resulting from sexual reproduction
  2. 2. a fertilized egg; the first diploid (2n) cell of an individual containing DNA from both parents
  3. 3. a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
  4. 6. spindle fibers attach to centromeres of chromosomes; chromosomes align down the middle (equator) of the cell
  5. 10. Unregulated cell growth
  6. 11. reproduction in which a cell divides to make an IDENTICAL copy of itself; Examples: Binary fission (Bacteria), Mitosis
  7. 13. cell that contains both sets of homologous chromosomes; Example: all somatic (body) cells are diploid
  8. 14. the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane
  9. 16. A fiber that is used to bring the sister chromatids to the polls