Topic 1: Genetics and heredity

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Across
  1. 1. Enzyme that adds nucleotides to a growing DNA strand.
  2. 7. Process where ribosomes use mRNA to assemble amino acids into a protein.
  3. 8. Exchange of DNA between homologous chromosomes during meiosis.
  4. 10. Structure made of DNA and proteins that carries genetic information.
  5. 11. Process where a DNA sequence is copied into messenger RNA.
  6. 12. Molecule that carries genetic information in cells.
  7. 14. Shape of DNA formed by two complementary strands twisted together.
  8. 15. Three-base sequence on mRNA that codes for a specific amino acid.
  9. 17. Permanent change in the DNA sequence.
  10. 18. Mutation involving a change in a single nucleotide base.
  11. 19. Specific pairing of nitrogenous bases in DNA (A with T, C with G).
  12. 20. Type of cell division that produces genetically different haploid gametes.
Down
  1. 2. Small circular DNA molecule commonly found in bacteria.
  2. 3. Segment of DNA that codes for a functional product such as a protein.
  3. 4. Mutation caused by insertion or deletion that shifts the reading frame.
  4. 5. Proteins that DNA wraps around to help organise chromosomes.
  5. 6. Process by which DNA makes an identical copy of itself.
  6. 9. Enzyme that unwinds the DNA double helix during replication.
  7. 13. Basic unit of DNA consisting of a base, sugar and phosphate group.
  8. 16. Short DNA segments formed on the lagging strand during replication.