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