Across
- 8. the full name of DNA
- 10. An allele that is only expressed when two copies are present
- 12. The molecule that carries genetic information
- 13. Differences caused by the environment, such as scars or a suntan
Down
- 1. A characteristic that falls into separate groups, such as blood group
- 2. structures found in the nucleus that contain DNA
- 3. The differences between individuals of the same species
- 4. the instructions passed from parent to offspring
- 5. The natural surroundings that can affect how an organism develops
- 6. different versions of the same gene
- 7. where the genetic information is located
- 8. An allele that is expressed when only one copy is present
- 9. A small section of DNA that controls a characteristic
- 11. A characteristic that can be measured, such as height or mass