Across
- 3. Differences among individuals in traits or genes
- 4. Choosing mates based on traits, not by chance
- 6. Movement of genes between populations
- 9. Change in DNA sequence that creates new variation
- 10. Different forms of a gene
- 12. Random change in allele frequencies
- 13. Process that drives adaptation in populations
Down
- 1. Small evolutionary changes within a population
- 2. New population started by few individuals
- 5. A characteristic that improves fitness
- 7. Basic unit of heredity
- 8. Favoring traits that increase survival or reproduction
- 11. Sharp reduction in population size and genetic diversity
- 12. Total collection of genes in a population