Biology unit crossword

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Across
  1. 3. a type of single strand RNA in protein synthesis
  2. 6. a variation in the DNA sequence
  3. 16. The exchange of DNA from paired homologous that occurs during meiosis
  4. 17. nitrogen but with chemicals of a base
  5. 18. process where DNA is copied to mRNA molecules
  6. 20. 2 dominant genes from the same gene
  7. 21. a more visible trait
  8. 22. double helix genetic code
  9. 24. a form of cell division where the offspring receives half the DNA of the parent
  10. 25. pairs of identical copies of DNA joined at a point called the centrometre
  11. 26. basic unit of heredity passed from parent to child
  12. 27. a reproduction method requiring 2 parents
  13. 28. process of cells transforming to specialized cells to perform special tasks
  14. 30. the chance of something happening
  15. 31. molecule containing a nitrogen-base, sugar and phosphate
Down
  1. 1. process of mRNA molecules translation information to a sequence of amino acids
  2. 2. a biomolecule composed of amino acids and peptide bonds
  3. 4. Process where genome DNA is copied into cells
  4. 5. passing genetic information from parent to child
  5. 7. a square showing all possible genetic outcomes
  6. 8. two chromosomes in a pair, normally 1 from each parent
  7. 9. A change in the DNA sequence
  8. 10. a dominant gene out of 2 genes
  9. 11. a characteristic of an individual
  10. 12. a less visible trait
  11. 13. how genes independently seperate during reproductive development
  12. 14. thread-like structures made of DNA in the nucleus
  13. 15. a reproduction method cloning the parent
  14. 19. molecules combining to form proteins
  15. 23. intercellular structure made up of mRNA and protein
  16. 29. a sequence of consecutive nucleotides in a DNA or RNA molecule