Unit 7 Cell Division

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Across
  1. 2. Cells that contain two complete sets of chromosomes, one from each parent, represented as 2n (n = 23 in humans).
  2. 3. During prophase I, homologous chromosome pairs swap genes to create genetic variation.
  3. 5. A section of DNA that contains the instructions to make proteins, which then code for traits.
  4. 10. The organized, tightly coiled form of DNA.
  5. 11. The unorganized, loose form of DNA.
  6. 13. After mitosis, cell contents are divided
  7. 15. Chromatin condenses into chromosomes.Nuclear membrane disappears.
  8. 16. Two nuclei start to form. Chromosomes decondense
  9. 17. Chromosomes are lined up in the middle of the cell by spindle fibers.
  10. 19. The process by which germ cells divide the nucleus to produce gametes for reproduction.
  11. 20. The center of the chromosome where the sister chromatids attach.
  12. 21. The process by which somatic cells divide the nucleus to make two identical cells.
Down
  1. 1. Are a pair of chromosomes that have,same size,same gene locations,one from the biological mother,one from the biological father
  2. 4. During metaphase I, chromosome pairs line up randomly, so daughter cells may receive any combination of the maternal or paternal chromosomes.
  3. 6. Chromosomes break at the centromeres, and sister chromatids are pulled apart.
  4. 7. "Growth 1”- Cell does normal cell activities and replicates organelles.“Synthesis”-DNA replication occurs(copy of DNA is made).“Growth 2”- Cell grows, DNA is checked for mutations, and the cell prepares for division.
  5. 8. Chromatid One copy or one side of a chromosome.
  6. 9. Haploid reproductive cells.
  7. 12. A cell with one set of chromosomes (n).n = 23 chromosomes (“half”).
  8. 14. Cells that make up the body.Examples: Nerve cells, muscle cells, bone cells, etc.
  9. 18. The entire set of DNA of an organism. Humans = 23 pairs of chromosomes.