Across
- 4. gene _____ reduces genetic differences between populations over time
- 5. genetic _____ describes unpredictable changes in allele frequencies in a small population due to chance
- 8. a trait that increases individual fitness
- 10. a change in traits of individuals in a population over generations
Down
- 1. the ultimate source of new alleles
- 2. a group of individuals of the same species
- 3. similarity resulting from common ancestry
- 4. the relative survival and reproduction of one genotype
- 5. ____ characters are often a single gene with two different alleles
- 6. ______ selection is the selective breeding of plants and animals by humans
- 7. the distribution of species on Earth
- 9. gene _____ describes allele frequencies for a population at a specific point in time