Biology

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Across
  1. 2. replaces thymine in RNA
  2. 4. wall rigid outer layer of a plant cell
  3. 7. threadlike structure of DNA
  4. 8. a change in the genetic code
  5. 9. genetic makeup of a particular organism
  6. 13. how many nitrogen bases does RNA and DNA have
  7. 14. Gregory Mendel introduced what
  8. 15. bone described as an elbow for humans
  9. 16. cell division that produces reproductive cells
  10. 18. allele completely hides the effects of a recessive allele.
  11. 19. apart of the cell growth and reproduction
Down
  1. 1. dissolving substances in a solution
  2. 3. a substance used to kill microorganisms and cure infections
  3. 5. specific sequence of three adjacent nucleotides on a strand of DNA or RNA
  4. 6. internal skeleton
  5. 7. green pigment found in photosynthetic organisms
  6. 10. change over time
  7. 11. how many main types of RNA are there
  8. 12. ancestry of an individual
  9. 17. codes for everything in a cell