Across
- 3. The basic unit of heredity
- 6. The observable characteristics of an organism
- 7. Threadlike structure carrying genetic information
- 8. A trait that is expressed even when only one copy is present
- 10. A trait that is only expressed when two copies are present
Down
- 1. The genetic makeup of an organism
- 2. Having two different alleles for a trait
- 4. Alternative forms of a gene
- 5. Having two identical alleles for a trait
- 9. The study of heredity