Biology Vocabulary

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Across
  1. 2. always expressed
  2. 9. different alleles
  3. 11. nitrogenous base that pairs with adenine
  4. 12. shape of DNA
  5. 13. cell creates RNA copy of a specific DNA sequence
  6. 14. process that changes mRNA into amino acids
  7. 16. cross for two traits
  8. 17. carries genetic information
  9. 19. chromosomes unwind,spindle breaks down(stage 4)
  10. 20. chromatids pulled apart (stage 3)
  11. 21. nitrogenous base that pairs with cytosine
  12. 22. nitrogenous base that pairs with thymine
  13. 24. only expressed if both alleles are present
  14. 27. Same alleles
  15. 28. links sugar and base molecules of nucleotide together
  16. 30. type of sugar key to DNA
Down
  1. 1. two structures fit together perfectly
  2. 3. single unit that makes up DNA
  3. 4. cross for a single trait
  4. 5. stage that prepares for cell division
  5. 6. cell division,results in two identical cells
  6. 7. division of cytoplasm
  7. 8. random change in the sequence of a gene
  8. 10. single stranded version of DNA
  9. 15. molecules that carry genetic information
  10. 18. process where cells create amino acids
  11. 23. chromosomes line up in middle (stage 2)
  12. 25. nitrogenous base that pairs with guanine
  13. 26. cell growth phases
  14. 29. nucleus disappears(stage 1)