Across
- 5. The genetic constitution of an individual organism
- 7. DNA-carrying structure
- 8. The study of heredity and the variation of inherited characteristics
- 9. Observable traits
- 12. trait that helps an organism survive
Down
- 1. The process by which organisms better adapted to their environment tend to survive and produce more offspring
- 2. Having two different alleles for a trait
- 3. An allele that only expresses its phenotype when a dominant allele is not present
- 4. Variant form of a gene
- 6. Change in species over time
- 10. Having two identical alleles for a trait
- 11. A change in the DNA sequence