Development

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Across
  1. 2. outer cell layer
  2. 5. results in identical somatic (body) cells and occurs during growth and repair (diploid)
  3. 6. repeated cell division
  4. 9. made of repeating units called nucleotides, one phosphate and one nitrogenous base
  5. 11. formation of organs and tissues during development
  6. 12. uniting of egg and sperm
  7. 13. DNA replicates (copies)
  8. 14. solid mass of stem cells
  9. 18. Division of cell to form two identical daughter cells
  10. 20. Located in the Eukaryotic nucleus, combination of a DNA molecule and specialized proteins called histones, Contain genes
Down
  1. 1. nitrogenous base in DNA
  2. 3. middle cell layer
  3. 4. causes a cell to become specialized
  4. 7. innermost cell layer
  5. 8. triggers the development of male genitals
  6. 10. holds embryo in fluid
  7. 15. large diffusion filter
  8. 16. hollow ball of cells
  9. 17. gives rise to gametes that have half the number of chromosomes as the original cell (haploid)
  10. 19. type of cells of living organisms other than the reproductive cells.