Genetics Revision Crossword

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Across
  1. 4. An individual with two different alleles for a gene
  2. 6. Alternative forms of a gene
  3. 7. The genetic differences in a population
  4. 9. Coiled up piece of DNA found in the nucleus
  5. 12. Make up the rungs of the DNA ladder
  6. 13. Physical appearance of a genotype
  7. 14. A permanent change in DNA
Down
  1. 1. The base that pairs with Thymine
  2. 2. The process when a sperm and egg combine together
  3. 3. Makes up the sides of the DNA ladder
  4. 5. Section of DNA that codes for a characteristic
  5. 8. Makes up the sides of the DNA ladder
  6. 10. Molecule that contains the genetic code for an organism
  7. 11. The male gamete in animals